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? Select the correct option
A) 15 mins
B) 20 mins
C) 10 mins
D) 25 mins
E) 30 mins
speed of the bus excluding stoppages = 54 kmph   speed of the bus including stoppages = 45 kmph   Loss in speed when including stoppages = 54 - 45= 
<gadget id="calculator">54 - 45</gadget>
<output>9</output>
9kmph=&gt; 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   =distance/speed=9/54 hour=1/6 hour = 60/6= 
<gadget id="calculator">60/6</gadget>
<output>10</output>
10 min   Answer is 10 mins.
<result>C</result>
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?