Water in a rectangular reservoir having base 80m by 60m is 6.5m deep. In what time can the water be emptied by a pipe of which the cross-section is a square of side 20cm, if the water runes through the pipe at the rate of 15 km/hr.

Explanation

To solve the problem step by step, we will follow these steps:

### Step 1: Calculate the Volume of the Reservoir
The volume \( V \) of a rectangular reservoir can be calculated using the formula:
\[ V = \text{Length} \times \text{Breadth} \times \text{Height} \]
Given:
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