Question

diameter of circle whose area is 154cm​

Answer 1

Answer:

Area of circle : 154 cm²

Area of circle : πr²

∴, 22/7 x r x r : 154

∴, 22 x r x r : 154 x 7

∴, 22 x r x r : 1078

∴, r² : 1078/22

r² : 49

∴, r : √49

∴, r : 7 cm

∴, Diameter : 14 cm