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Q.
A person walking 6/7 of his usual rate is 30 minutes late. What is his usual time ?
A.
2 hrs 50 min
B.
3 hrs 25 min
C.
3 hrs
D.
2 hrs 5 min
View Answer
Correct choice: C
Explanation:
Let t be the usual time. If the usual rate is 1 unit, then the unusual rate is 6/7. Balance by the distance, 1 x t = (6/7)(t + 30) 7t = 6(t + 30) we get t as, t = 180 minutes = 3 hrs.
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