A man travels some distance at a speed of 12 km/hr and returns at a speed of 9 km/hr. If the total time taken by him is 2 hrs 20 min, the distance is
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 12 km
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Understanding |
Application |
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Suppose the distance = A km |
A man travels some distance at a speed of 12 km/hr and returns at a speed of 9 km/hr. So, Total time taken = A/12 + A/9 = 7A/36 |
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Total time taken by him is 2 hrs 20 min or 140 min. |
So, 7A/36 = 140/60 ⇒ A = 12 Hence, Distance = 12 km |