While covering a distance of 24 km a man noticed that after walking for 1 hour and 40 minutes ...........

Quantitative Aptitude ( CCS) Time & distance

While covering a distance of 24 km, a man noticed that after walking for 1 hour and 40 minutes, the distance covered by him was 5/7 of the remaining distance. His speed in metres per second was ?

1 2/3 m/sec

2 m/sec

2 2/3 m/sec

5 m/sec

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Explanation:

Let the distance travelled = d
Remaining distance = 24 - d
So, d = 5/7 * (24 - d)
=> 7d = 120 - 5d => 12d = 120 => d = 10 km
Time = 5/3 hours
So, speed = 10/(5/3) = 6 kmph = 6*5/18 = 30/18 = 5/3 = 1 2/3 m/sec