Here r= 7 cm and Π = 22/7 = (1/2) x (22/7) x 7² = (1/2) x (22/7) x 7 x 7 = 1 x 11 x 7 = 77 cm² Example 2 Find the area of the semicircle whose radius is 35 cm Solution Area of Semicircle = (1/2) Π r² Here r = 35 cm and Π = 22/7 = (1/2) x (22/7) x (35)² = (1/2) x (22/7) x 35 x 3550 पैसे प्रति वर्ग मीटर पर एक गोलाकार क्षेत्र को समतल करने की लागत 7700 रुपये है। बाड़ लगाने की लागत (रुपये में) 1 रुपये प्रति मीटर है (π = 22/7 का उपयोग कीजFind the volume of a cone, if its total surface area is 7128 sqcm and radius of base is 28 cm (π = 22/7) asked Aug 4 in Surface Area and Volume by Navin01 ( 506k points) surface area and volume
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π is not 22/7-D (diameter) is given at 28 cm Also, it was stated that we will be using (π = 22/7) for this particular problem Given C = ?Volume of tank 1/ 22 7 Volume = π r 2 h 0,9 Note π = 22 7 0,9 2,8 7,13 m 3 OR Volume of tank 1/ 22 7 Volume = π r 2 h (0,9) 2 2,8 7,13 m 3 Volume of water in the tank 1/ 7,13 = volume of tank x 1 000 1 000 7 130 ℓ (8) 30 OR
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(π = 22/7) Solution 52 Question 53 Water is flowing at the rate of 252 km/h through a cylindrical pipe into a cylindrical tank, the radius of the base is 40 cm If the increase in the level of water in the tank, in half an hour is 315 m, find the internal diameter of the pipeSubstitute π = 22/7 and r = 14 ≈ (22/7) x 14 2 = (22/7) x 14 x 14 = 22 x 2 x 14 = 616 So, area of the given circle is about 616 square ft Example 5 Find the length of the rope by which a goat must be tethered in order that it may be able to graze an area of 9856 square meters Solution C/d = (pi)d/d C/d = pi X 1 because d/d = 1 so that gives us C/d = pi The ratio C/d "defines" the constant pi, regardless of a circle's size, in geometric equations, but π also occurs in areas of mathematics that do not directly involve geometry Pi is the letter p, π in Greek
The outer circumference of a circular racetrack is 528 m The track is everywhere 14 m wide Calculate the cost of levelling the track at the rate of 50 paise per square metre (Use π= 22/7) Solution Let R and r be the radii of the outer and inner of track Outer circumference of the race track = 528 m Question 30 Convert angle in radian Angle in radians = Angle in degrees x π/180° = 45° x π/180° = π/4 From (1), Radius = (length arc)/Central angle = 33/ (π/4) = 132 x 7/22 = 42 Therefore radius is 42 cm Please log in or register to add a comment ← Prev Question Next Question →(π = 22/7) Solution 34 Question 35 AB and CD are two diameters of a circle perpendicular to each other and OD is the diameter of the smaller circle If OA = 7 cm, find the area of the shaded region Solution 35 Question 36 PSR, RTQ and PAQ are three semicircles of diameters 10 cm, 3 cm and 7 cm respectively Find the perimeter of the
(take π = 22/7) r = radius , d = diameter A = r² π or A = d² π / 4 so A = 22 / 7 r² π or A = 22 / 7 d² π / 4 A = 22 / 28 d² 👍 The two numbers π and 22 / 7 are not equal, so there's no contradiction in one being rational and the other irrational Sometimes you use 22 / 7 as a number "fairly close" to π, but π = while 22 / 7 = Share answered Nov 26 '15 at 1154 Mankind
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Circumference Of A Circle Using 22/7 For Pi Watch this tutorial and learn or review how to find the circumference of a circle using 22/7 for pi The given radius is a mixed numberA lead pencil consists of a cylinder of wood with solid cylinder of graphite filled in the interior The diameter of the pencil is 7 mm and the diameter of the graphite is 1 mm If the length of the pencil is 14 cm, find the volume of the wood and that of the graphite (Assume π = 22/7) Solution θ = 41°, r = 10 ft Question 7 If in two circles, arcs of the same length subtend angles 60° and 75° at the centre, find the ratio of their radii Solution Let the two radii be r 1 and r 2 The central angles arc 60° and 75° The arc lengths be s 1
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Because pi is irrational (not equal to the ratio of any two whole numbers), its digits do not repeat, and an approximation such as 314 or 22/7 is often used for everyday calculations To 39 decimal places, pi is(Missing) d = 28 cm π = 22/7 Plugin or substitute the following mentioned values in the formula where d (diameter) is present or given Therefore, C = d π C = (2 8) (7 2 2 ) C = 7 6 1 6 = 8 8 c mWhat is the curved surface area of a hemisphere whose radius is 7 cm?
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The radii of the bottom and top of the reservoir are 50 metres and 100 metres respectively Find the depth of water and the lateral surface area of the reservoir (Take π = 22/7) Solution A reservoir is a frustum in shape and its upper radius (r 1) = 100 m Lower radius (r 2) = 50 m and capacity of water in it = 44 x 10 7 litres PQSolutions for Chapter 6 Problem 43P A reservoir supplies water through 100 m of 30cmdiameter cast iron pipe to a turbine that extracts 80 hp from the flow The water then exhausts to the atmosphere Neglect minor losses (a) Assuming that f ≈ 0019, find the flow rate (there isApproximation A quick and easy approximation for π is 22/7 22/7 = But as you can see, 22/7 is not exactly rightIn fact π is not equal to the ratio of any two numbers, which makes it an irrational number A really good approximation, better than 1 part in 10 million, is
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Ex 31, 4 Find the degree measure of the angle subtended at the centre of a circle of radius 100 cm by an arc of length 22 cm ("use " π" = " 22/7)Given 𝑙 = 22 cmr = 100 cm𝜃 = ?By calculating the perimeters of these polygons, he proved that 223 / 71 < π < 22 / 7 (that is < π < ) Archimedes' upper bound of 22 / 7 may have led to a widespread popular belief that π is equal to 22 / 7 (a) radius = 14 mm (Take π=22/7) (b) diameter = 49 m (c) radius = 5 cm Answer 2 It is known that area of circle = πr 2 where r is radius (a) radius = 14 mm Area of circle =πr 2 (c) radius = 5 cm Area of circle =πr 2 Question 3 If the circumference of a circular sheet is 154 m, find its radius Also find the area of the sheet (Take π
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If you are on the north pole of this star and send a text message to your friend on the south pole, in how many seconds will you get the reply assuming she replies right away?Light (and texts) travel at 300,000 kilometers per second 1 mile = 161 kilometers If r is the radius, then the circumference of a circel is 2 π r π = 22/7We know that𝑙 = r θ Putting value22 = 100 × θ 22/100 = θ θ = 22/100 radians (टीचू) Maths
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Example 2 What is the area of the semicircle if the perimeter of the semicircle is 144 units(Use π = 22/7) Solution Given the perimeter of the semicircle is 144 unitsLet the radius of the semicircle be "r" and the area of the semicircle be "A" As we know, perimeter of semicircle = (π 2)r units ⇒ P = (π 2)r = (22/7 2)r = 144 units(Assume π = 22/7) Solution Radius (r) of heap = (105/2) m = 525 Height (h) of heap = 3m Volume of heap = (1/3)πr 2 h = (1/3)×(22/7)×525×525×3 = The volume of the heap of wheat is m 3 Again, = (22/7)×525×605 = 995 Therefore, the area of the canvas is A big hemispherical dome with a cuboidal structure mounted on it (Take π = 22/7) 1 Calculate the volume of the hemispherical dome if the height of the dome is 21 m –
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A toy is in the form of a cone of base radius 35 cm mounted on a hemisphere of base diameter 7 cm If the total height of the toy is 155 cm, find the total surface area of the toy(use π =22/7) Solution Question 6 In figure, a tent is in the shape of aThe amount of liquid the cylindrical container can hold is simply the volume of the container Volume of a cylinder = π*R 2 H R = 14cm H = 18cm π = 22/7 Trigonometry ML Aggarwal ISC Class11 Maths Understanding Solutions Chapter3 Step by step Solutions of ML Aggarwal ISC Class11 Mathematics with Exe11, Exe12, Exe13, Exe14, Exe15, Exe16, Exe17, Exe18, Exe19, Exe110 and Chapter Test Questions Visit official Website CISCE for detail information about ISC Board Class11
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1 Answers Available Asked by Bright on 12th July, 21 To get notifications when anyone posts a new answer to this question, Follow New Answers Post an Answer Please don't post or ask to join a "Group" or "Whatsapp Group" as a Correct answer Taking π = 22/7, find the area of the circle whose diameter is 28 cm eanswersincomClick here👆to get an answer to your question ️ In figure, from a cuboidal solid metalic block, of dimensions 15cm × 10cm × 5cm , a cylindrical hole of diameter 7cm is drilled out Find the surface area of the remaining block (Take pi = 22/7 )
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(Assume π = 22/7) Satkriti Roao (@satkritiroao) Noble Member 2249 Posts 2248 3 0 Add a comment Topic s class 9 cbse ncert surface areas volumes 1 Answer 0 1058 am Let the radius of the sphere be r Surface area of sphere = 154 (given) 4πr 2 = 154 r 2(Assume π=22/7) Looking to do well in your science exam ?22/7 is a rational number as is defined a ratio of 2 integers (nonzero denominator) Many people confuse π with 22/7 We are taught in schools that π=22/7 What they should actually teach is
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Book a free class now The diameter of cylindrical bowl = 7 cm Radius of cylindrical bowl, r = 7/2 cm = 35 cm Bowl is filled with soup to a height of 4 cm, so h = 4 cm 300 = Degree measure Degree measure = 300° Ex 31, 2 Find the degree measures corresponding to the following radian measures ("use " π" = " 22/7) (iv) 7𝜋/6 We know that Radian measure = 𝜋/180 × degree measureLearn from an expert tutor Book a free class!
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The track is 7m wide everywhere Calculate the cost of putting up a fence along the outer circle at the rate of j – 2 per metre (Use π = 22/7) Solution Let the inner and outer radii of the circular track be r metres and R metres respectively Then, Inner circumference = 2 metres
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