The number of solid spheres , each of diameter 6 cm , that can be made by melting a solid metal cylinder of height of 45 cm and diameter 4 cm , is

Options

A. 2
B. 4
C. 5
D. 6

Answer

C

Explanation

Number of spheres `= ("volume of the cylinder" )/("Volume of each sphere")`
`=(pi xx 2xx2 xx 45)/(4)/(3)xx pi xx 3xx 3 xx 3=5`