Question
A man travels one-third of a journey at 40 km/h,
one-fourth of the journey at 60 km/h and the remaining distance at 100 km/h. If the total distance is 240 km, then what is the total time taken?Solution
First part = 80 km at 40 km/h Time = 2 hours Second part = 60 km at 60 km/h Time = 1 hour Remaining distance = 100 km at 100 km/h Time = 1 hour Total time = 2 + 1 + 1 = 4 hours Hence, the correct answer is 4 hours.
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