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Tank is in the form of hemisphere with diameter =3m
r=3/2
Volume= 2/3πr^3
2/3 x 22/7 x 3/2 x 3/2 x 3/2
= 99/14m^3
99000/14 Litres
Emptied= 1/2 x 99000/14
=99000/28
Rate = 25/7 Litres/second
.
. 99000/28 x 7/25
=
693000/700 seconds
=990 seconds
=16.5 minutes
r=3/2
Volume= 2/3πr^3
2/3 x 22/7 x 3/2 x 3/2 x 3/2
= 99/14m^3
99000/14 Litres
Emptied= 1/2 x 99000/14
=99000/28
Rate = 25/7 Litres/second
.
. 99000/28 x 7/25
=
693000/700 seconds
=990 seconds
=16.5 minutes
anamika100403:
thnq
ur wlcm
no no I jst wanted the final answer to check my answer
thnx again
16.5 minutes
yes yes thnx
btw what u got?
16.5 minutes
ohk
yep
Answered by
1
diameter is given, 3m
radius= 3/2m
volume of the tank= 2/3πr^3
= 2/3 × 22/7 × 3/2 × 3/2 × 3/2
= 99/14m^3
1m^3 = 1000litres
= 99/14 ×1000
= 99000/14 litres
then, volume of water to be emptied = 1/2× 99000/14 litres
= 99000/28 litres
Now, it's given that tank is emptied at 25/7 litres per second
Time taken to empty 25/7 = 1 second
Time taken to empty 1 litres = 1 × 7/25
= 99000/28 = 7/25
= 7/25 × 99000/28
= 693000/700
= 990 seconds
convets it into minute,
1 minute = 60 seconds
1 second = 1/60 minutes
990 seconds = 990/60 minutes
= 16.5 minutes
radius= 3/2m
volume of the tank= 2/3πr^3
= 2/3 × 22/7 × 3/2 × 3/2 × 3/2
= 99/14m^3
1m^3 = 1000litres
= 99/14 ×1000
= 99000/14 litres
then, volume of water to be emptied = 1/2× 99000/14 litres
= 99000/28 litres
Now, it's given that tank is emptied at 25/7 litres per second
Time taken to empty 25/7 = 1 second
Time taken to empty 1 litres = 1 × 7/25
= 99000/28 = 7/25
= 7/25 × 99000/28
= 693000/700
= 990 seconds
convets it into minute,
1 minute = 60 seconds
1 second = 1/60 minutes
990 seconds = 990/60 minutes
= 16.5 minutes
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