Question

the radius of a circle is 7 centimetre. find the radius of that circle whose area is double of the area of the circle.

Answer 1

Given ,
Radius = 7cm.

We know that ,
Area of circle = π r²

Now , Area of circle = 22/7 * 7² = 22*7 = 154 cm² .

Given another circle radius = 2*154 = 308cm² .

Now ,
πr² = 308
r² = 98
r = √98 cm.

Answer 2

solution ⤵️

area of the circle=2πr²

given data,.

radius of the circle=7cm

diameter of the circle=2×7=14cm

now we find the area of the circle

to find the area of the circle we follow these steps:-

Area of the circle=2πr²

Area of the circle=2×22/7×7×7=308 cm²

area of a semicircle=πr²

circle

A circle is a shape consisting of all points in aplane that are a given distance from a given point, the centre; equivalently it is the curve traced out by a point that moves in a plane so that itsdistance from a given point is constant. Circumference: 2π x radius

Diameter: 2 x radius

Number of vertices: 0

Number of edges: 0

Area: π× (radius)²