How many balls of radius 45 cm can be made by melting a bigger ball of diameter 360 cm?

64 128 32 48

64

Diameter of bigger ball = 360 Then the radius = 180 = R Radius of small ball = 45 Then the number of smaller balls that can be made from bigger ball = \(\frac{R^3}{r^3}\) = \(\frac{180^3}{45^3}\)  = \(\frac{5832000}{91125}\) = 64