Gautam goes to office at a speed of 12 kmph and returns home at 10 kmph. His average speed is
10.9
To find the average speed for a round trip, we use the formula:
\( \text{Average speed} = \frac{2 \times \text{Speed 1} \times \text{Speed 2}}{\text{Speed 1} + \text{Speed 2}} \)
Here, Speed 1 = 12 km/h and Speed 2 = 10 km/h.
Substituting the values:
\( \text{Average speed} = \frac{2 \times 12 \times 10}{12 + 10} = \frac{240}{22} = 10.9 \) km/h.
Hence, the correct answer is Option 3.
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