Question

A solid metal cylinder of radius 14cm and height 21cm is melted and cast into spheres of radius 3cm. Calculate the number of sphere that can be made

Answer 1

Volume of cylinder =

$\pi \times {0.14}^{2 } \times 0.21$

=0.0129307954 cube meters

Volume of a sphere =

$4 \div 3 \times \pi \times {0.03}^{3}$

0.0001130973 cube meters

no. of spheres that can be made = =0.0129307954/0.0001130973

= 98.728710498 no. of spheres.