Area Questions & Answers for Bank Exams : The circumference of a circle is 88 cm. answered Dec 1 by Chitranjan (27.1k points) selected 3 days ago by Maira01 . Find its radius (in cm). Apply the second equation to get Ï x (12 / 2) 2 = 3.14159 x 36 = 113.1 cm 2 (square centimeters). are solved by group of students and teacher of Class 7, which is also the largest student community of Class 7. Using the knowledge that the diameter is 4.3m on the diagram and knowing that C = Ïd, we can calculate the circumference. This discussion on Find the diameter of a circle whose circumference is 88 cm. is done on EduRev Study Group by Class 7 Students. Let A 1 = the area of the circle whose radius is 20 m [given] A 2 = the area of the circle whose radius is 48 m [given] Now we have to find the radius of third circle such that whose area is equal to the sum of areas of two fields. 1 Answer +1 vote . Area Questions & Answers for Bank Exams : The circumference of a circle is 88 cm. Where: Ï is approximately equal to 3.14. If you donât know the radius, however, you can still calculate the area if you are given the length of the circleâs circumference, or perimeter. asked Jun 13, 2019 in Class VII Maths by muskan15 ( -3,443 points) Answer. Best answer. measurement; class-7; Share It On Facebook Twitter Email. The missing length is the circumference. Find the diameter of a circle whose circumference is equal to the sum of circumference of circles with radii 10 cm, 12 cm and 18 cm. It doesn't matter whether you want to find the area of a circle using diameter or radius - you'll need to use this constant in almost every case. For example, if the radius is 5 inches, then using the first area formula calculate Ï x 5 2 = 3.14159 x 25 = 78.54 sq in.. With a little thinking we can easily figure out that, C = Ï x 4.3m = 13.51m (to 2 decimal places). Area of a circle diameter. Task 1: Given the radius of a cricle, find its area. We know that Circumference of circle is 2Ïr Circumference = 2Ïr = 22 cm r = 22/2Ï r = 11/Ï r = 11 ÷ 22/7 r = 11 × 7/22 r = 7/2 cm r = 3.5 cm Radius of circle is 3.5 cm. This free area calculator determines the area of a number of common shapes using both metric units and US customary units of length, including rectangle, triangle, trapezoid, circle, sector, ellipse, and parallelogram. Example: find the area of a circle. The Questions and Answers of Find the diameter of a circle whose circumference is 88 cm. Find the area of the circle whose circumference is 88 cm. Friends.. ! Also, explore the surface area or volume calculators, as well as hundreds of other math, finance, fitness, and health calculators. Hence, A 3 = A 1 + A 2 â Ï r 2 = Ï (20) 2 â¦ The diameter of a circle calculator uses the following equation: Area of a circle = Ï * (d/2) 2. Task 2: Find the area of a circle given its diameter is 12 cm. Well, from the area, we could figure out what the radius is, and then from that radius, we can figure out what its circumference is. Calculate the area (in sq.cm) of a circle whose diameter is â¦ And so if you look at it on both sides of this equation, if we divide-- let me rewrite it â¦ Find the area of a circle whose circumference is 8 pi m 2 See answers apologiabiology apologiabiology Area=pir^2 circumference=2pir given c=8pi c=2pir 2pir=8pi divide both sides by 2pi r=4 area=pir^2 are=pi4^2 area=16pi area=16pi square meters. Area of a circle = Ï * r 2. So we know that the area, which is 36pi, is equal to pi r squared. Find its radius (in cm). You can use a two-step process, solving first for the radius using the formula for the circumference: circumference = 2 Ï ( r ) {\displaystyle {\text{circumference}}=2\pi (r)} . Twitter Email Answers of find the area, which is 36pi, equal! 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