Walking with 6/7th of his usual speed , Prakash was late by 12 minutes . What is the usual time taken by Prakash to cover the distance ?
Question
Solution 1
Let's denote the usual speed of Prakash as S (in km/h for example), and the usual time he takes to cover the distance as T (in hours for example).
When Prakash walks with 6/7th of his usual speed, his speed becomes 6/7 * S.
We know that speed = distance / time. Therefore, time = distance / speed.
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