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?	Choose the correct option:
A) 12  B) 10  C) 11  D) 9  E) 8
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= 
<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 : 11
<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?