Question

A hemispherical tank of radius 1(3/4) m is full of water. It is connected with a pipe,

which empties it at the rate of 7 litres per second. How much time will it take to empty

the tank completely? [26.73 minutes]​

Answer 1

Answer:

26.73 minutes

Step-by-step explanation:

radius = 7/4 m

volume of tank = 2/3 *pi*r^3 = 2/3 * 22/7 * 7/4 * 7/4 * 7/4 = 44*49/192

= 11*49/48 = 11.291167 cumic metre = 11229.167 litres

rate at which is being emptied = 7 litres/ s

time taken = 11229.167/7 = 1604 seconds = 26.73 minutes