Question

A former connects a pipe of internal diameter $20cm$ forms a canal into a cylinder tank which is $10m$ in diameter and $2m$ deep? the water flows though the pipe at the rate of $4km$ per hour. in how much time will the tank be filled competently?

Answer 1

$\begin{array}{c}r=\frac{20}{2}=10cm=.1m\\ rate=4km=4000m\\ R=\frac{10}{2}=5cm\\ H=2m\\ \pi {\left(5\right)}^{2}2=\pi \times \frac{.1}{10}\times \frac{1}{10}\times \frac{4000}{60}{m}^3\\ Time=\frac{36\times 25\times 2}{4}\\ =75m\\ =1Hour15min\end{array}$