By walking at 4/5 of his usual speed, Mohan is 6 minute late to his office. find his usual time to cover the distance.
Answer with explanationAnswer: Option C
Here, Change in time = 6 and a/b = 4/5
We have, change in time = (b/a – 1) x original time
=> Original time = Change in time/(b/a – 1)
=>6(5/4 – 1) = 24 minute.
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