Excluding stoppages , the speed of the bus is 60 kmph and including stoppages the speed is 45 kmph. For how many minutes does the bus stop per hour ?20 min40 min25 min15 min30 min
Question
Excluding stoppages , the speed of the bus is 60 kmph and including stoppages the speed is 45 kmph. For how many minutes does the bus stop per hour ?20 min40 min25 min15 min30 min
Solution
The speed of the bus excluding stoppages is 60 kmph, and including stoppages is 45 kmph. This means that the bus covers less distance per hour including stoppages, which is due to the time it spends stopping.
First, let's find out the difference in distance covered in one hour with and without stoppages.
Without stoppages, in one hour (at 60 kmph), the bus covers 60 km. With stoppages, in one hour (at 45 kmph), the bus covers 45 km.
So, the difference is 60 km - 45 km = 15 km.
This 15 km is the distance that the bus could not cover because it was stopped.
Since the speed of the bus is 60 kmph, it means it covers 1 km in 1 minute (since 60 minutes are in an hour).
Therefore, for 15 km, the bus would take 15 minutes.
So, the bus stops for 15 minutes per hour.
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