Shekhar walked a distace at a speed of 8 km/h. He was in a hurry, so on the return journey he travelled in an autorickshaw at a
speed of 24 km/h. Find his average speed for the entire journey?
This questions was previously asked in
SSC MTS 2nd Nov 2021 Shift-1
Explanation:
- Shekhar walked a distance with a speed of 8 km/h.
- On his return journey by autorickshaw, he traveled at a speed of 24 km/h.
- The total distance of the journey is the same in both directions.
To find the average speed for the entire journey, use the formula:
\[ \text{Average speed} = \frac{2 \times \text{speed}_1 \times \text{speed}_2}{\text{speed}_1 + \text{speed}_2} \]
\[ \text{Average speed} = \frac{2 \times 8 \times 24}{8 + 24} = \frac{384}{32} = 12 \text{ km/h} \]
- Option 1: 20 km/h – Incorrect.
- Option 2: 32 km/h – Incorrect.
- Option 3: 12 km/h – Correct.
- Option 4: 16 km/h – Incorrect.
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