| 50 men took a dip in a water tank, 40 m long and 20 m broad on Amavasya. If the average displacement of water by a man is \[4\,\,{{m}^{3}},\]then the rise in the water level in the tank will be |
A) 35 cm
B) 50 cm
C) 20 cm
D) 25 cm
Correct Answer: D
Solution :
| Average displacement of water by 50 men \[=200\,\,{{m}^{3}}\] |
| Let rise in the water level be h. |
| \[\therefore \]\[40\times 20\times h=200\] |
| \[\Rightarrow \] \[h=\frac{200}{40\times 20}=0.25\,\,m\] |
| \[\Rightarrow \] \[h=25\,\,cm\] |
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