A motor car approaching a cliff with a velocity of 90 kmph sounds the horn and the echo is heard after 20 seconds. Assuming the velocity of sound in air to be 332 ms, calculate the distance between the car and the cliff when the horn is sounded.

Explanation

To solve the problem, we will follow these steps:

### Step 1: Convert the velocity of the car from km/h to m/s
The velocity of the car is given as 90 km/h. We need to convert this to meters per second (m/s).

\[ \text{Velocity of the car (v)} = 90 \, \text{km/h} = \frac{90 \times 1000 \, \text{m}}{3600 \, \text{s}} = 25 \, \text{m/s} \]
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