Question
Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour?
Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour?
Answer: Option C
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Answer : Option C
Explanation :
speed of the bus excluding stoppages = 54 kmph
speed of the bus including stoppages = 45 kmph
Loss in speed when including stoppages = 54 - 45 = 9kmph
=> In 1 hour, bus covers 9 km less due to stoppages
Hence, time that the bus stop per hour = time taken to cover 9 km
$MF#%= \dfrac{\text{distance}}{\text{speed}} = \dfrac{9}{54}\text{ hour} = \dfrac{1}{6}\text{ hour = }\dfrac{60}{6}\text{ min} = 10\text{ min}$MF#%
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