Question

Find the radius and diameter of a circle in cm whose area is 15400mm^2

Answer 1

Answer:

R=70,Diameter=140

Step-by-step explanation:

Pi×r^2=15400

or,r^2=15400×7/22

or,r^2=4900

or,r=√4900

or,r=70

Radius=70

We know diameter=2 × radius

Diameter=2×70=140