Water is flowing at the rate of 15 km/hour through a pipe of diameter 14 cm into a cuboidal pond which is 50 m long and 44 m wide. In what time will the level of water in the pond rise by 21 cm ?

Explanation

To solve the problem step by step, we will calculate the time it takes for the water level in the pond to rise by 21 cm when water is flowing through a pipe.

### Step 1: Calculate the volume of water needed to raise the pond's water level by 21 cm.
The volume \( V \) of the cuboidal pond can be calculated using the formula:
\[ V = \text{Length} \times \text{Width} \times \text{Height} \]
Given:
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