Question

A hemispherical tank full of water is emptied by a pipe at the rate of 25/7 litres per second. how much time will it take to empty half tank, if it is 3m in diameter ? (pie = 22/7)​

Answer 1

Answer:

16.5 min

Step-by-step explanation:

diameter of tank=3m

radius=3/2m

volume of tank=2×22/7×3/2×3/2×3/2

=99/4m^3

half volume=99/14×1/2=99/28

in litres

99/28×1000=99000/28

it can empty25/7 litres in 1 second

so it can empty 1 litres in 7/25 second

it can empty 99000/28 litres in

=99000/28×7/25

=990 sec

=990/60

=16.5 min