Question 72

Excluding stoppages, the speed of a bus is 54 km/hr and including stoppages, it is 45 km/hr. For how many minutes does the bus stop per hour?

Solution

Time taken including stoppages be t and without stoppages be x.

d = 54 *x

d = 45*t

54x = 45t

x/t = 5/6

Let t be 1 hr = 60 minutes, x = 50 minutes (from above equation)

So, stoppage per hour = 10 minutes.

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