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Q.
A man walks at a speed of 2 km/hr and runs at a speed of 6 km/hr. How much time will the man require to cover a distance of 20 1/2 km, if he completes half of the distance, i.e., (10 1/4) km on foot and the other half by running ?
A.
12.4 hrs
B.
11.9 hrs
C.
10.7 hrs
D.
9.9 hrs
View Answer
Correct choice: B
Explanation:
We know that Time = Distance/speed Required time = (10 1/4)/2 + (10 1/4)/6 = 41/8 + 41/6 = 287/24 = 11.9 hours.
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