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Excluding stoppages, the speed of a bus is 80 kmph and including stoppages, it is 60 kmph. For how many minutes does the bus stop per hour?
- A12
- B15
- C18
- D20
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CCommunity
Distance covered by bus without stoppage at 80 km/hr in one hour = 80 km
Distance covered by bus with stoppage at 60 km/hr in one hour = 60 km
Time for stop per hour = (80km - 60km) / 80km/hr
⇒ Time for stop per hour = 1/4 hr
∴ Time for stop per hour = 1/4 × 60 min = 15 min
Distance covered by bus with stoppage at 60 km/hr in one hour = 60 km
Time for stop per hour = (80km - 60km) / 80km/hr
⇒ Time for stop per hour = 1/4 hr
∴ Time for stop per hour = 1/4 × 60 min = 15 min