find the radius of a circle whose circumference is 42 cm
Let r be the radius of the circle.
circumference = 42 cm
so, 2r = 42
r = 42 / 2 = (147/22) cm = 6.7 cm (approx)
circumference = 42 cm
so, 2r = 42
r = 42 / 2 = (147/22) cm = 6.7 cm (approx)