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 Walking 6/7th of his usual speed, a man is 12 minutes too late. The usual time taken by him to cover that distance is :

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 Walking 6/7th of his usual speed, a man is 12 minutes too late. The usual time taken by him to cover that distance is :

A). 1 hour

B). 1 hour 12 min.

C). 1 hour 15 min

D). 1 hour 20 min.


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Answered by on | Votes 0 |

1 hour 12 min.



New speed = 6/7 of usual speed.
New time = 7/6 of usual time.
(7/6 of usual time) - (usual time) = 1/5 hour.
Therefore, 1/6 of usual time = 1/5 hour
Usual time = 6/5 hours = 1 hour 12 min.

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