Question

A person walks equal distances with speed 3 km/h 4 km/h and 5km/h and takes a total time of 47 min total distance in km is

3km

how

Answer 1

Let the equal distance travelled be x km

Therefore total distance travelled = 3x km

Recall that, time taken = distance/speed

Hence by the given problem, we have

(x/3) + (x/4) + (x/5) = 47/60

[20x + 15x + 12x]/60 = (47/60)

47x = 47

Therefore, x = 1

Thus the total distance travelled = 3x = 3*1= 3 km

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