Excluding stoppages, the speed of a train is 45 kmph and including stoppages it is 36 kmph. Of how many minutes does the train stop per hour?
Choose the correct answer:
A) 19
B) 17
C) 12
D) 15
E) 18
T = 9/45 * 60= 
<gadget id="calculator">9/45 * 60</gadget>
<output>12</output>
12.Answer:12
<result>C</result>
Excluding stoppages, the speed of a train is 45 kmph and including stoppages it is 36 kmph. Of how many minutes does the train stop per hour?