Walking 3/7th of his usual speed, a man is 10min too late. The usual time taken by him to cover that distance:
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Answer:
7.5 minutes
Step-by-step explanation:
Let s be the speed, d be the distance and t be the time.
Speed = Distance/Time
Distance = Speed * Time.
=> d = st. ------------- [1]
d = 3/7s(t+10/60) --------- [2]
st = 3s/7(t+1/6)
st = 3st/7 + 3s/42
4st/7 = s/14
t = s/14 * 7/4s = 1/8 hr = 7.5 min.
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