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Volumes Practice Test 1
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© examsnet.com
Question : 20
Total: 40
A rectangular tank is 80 m long and 25m broad. Water flows into it through a pipe whose cross-section is 25
c
m
2
, at the rate of 16 km/hr. How much will the level of water rise in the tank in 45 minutes?
3 cm
3.375 cm
4 cm
5 cm
Validate
Solution:
👈: Video Solution
16 km/hr = 16 ×
5
8
= 10 m/s
In 45 minutes length of water column = 10 × 45 × 60
Hence, 80 × 25 × h =
25
100
×
100
× 10 × 45 × 60
∴ h =
45
×
3
2
×
80
×
25
m =
27
2
×
80
×
5
× 100 cm
=
27
5
cm = 3.375 cm
© examsnet.com
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