Question

find the radius of a circle whose area is 4 times the area of circle having radius 28cm(please solve this for me!)​

Answer 1

Answer:

Step-by-step explanation:

WKT

Area of a circle =  π * r * r

Given Radius = 28 cm

Area of the circle with radius 28 cm =  π * 28 * 28

Let the radius of the other circle be R

Then its Area =  π * R * R

Given

Area of circle = 4 * Area of Circle of Radius 28 cm

π * R * R = 4 *  π * 28 * 28

R * R = ( 28 * 2 ) * ( 28 * 2 )

R = 56 cm

Therefore the radius of the Circle is 56 cm

Hope it Helps