Question

A cylindrical tank of diameter 3m and height 7m is full of water. It is being emptied by a pipe 25/7 liters per second. How much time will it take to make the tank half empty ?​

Answer 1

hence diameter is 3m
so the radius is 1.5 m
and hight is 7m
so the volume of cylinder is pai r sqare ×h
= 22/7 × 1.5m × 1.5 m × 7m
=49.48mcube
=49480 liter
hence empty 25/7liter take one second
1 liter = 7/25
=49480 liter = 7/ 25 ×=49480 liter
= 13,854.4 second
=3.8484444444
= 4 hours approximate
hope it will help u