6. A hemispherical tank full of water is emptied by a pipe at the rate of 25/7 liters per second.
How much time will it take to empty half the tank. if it's 3m is diameter? (T=22/7)
Answers
Answer:
Volume of the tank =
3
2
πr
3
=
3
2
×
7
22
×(
2
3
)
2
=
14
99
m
3
=
14
99
×1000 litres
=
14
99000
litres
Volume of water to be emptied =
2
1
× Volume of tank
=
2
1
×
14
99000
=
28
99000
litres
Time taken to empty
7
25
litres=1 sec
Time taken to empty 1 litres=
25
7
sec
Time taken to empty
8
99000
litres=
25
7
×
28
99000
sec
=
700
693000
=990 sec
=
60
990
min
=16.5 min