Question

A school provides milk to the students daily in a cylindrical glasses of diameter $7cm$. If the glass is filled with milk upto a height of $12cm$. Find how many litres of milk is needed to serve $1600$ students.

Answer 1

Volume of milk in 1 glass $=\pi r^{2}h$

$\begin{array}{c}=\pi \times {\left(3.5\right)}^2\times 12\\ =461.58c{m}^2\end{array}$

for 1600 students milk needed is

$\begin{array}{c}=1600\times 461.58\\ =738258litre\end{array}$