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?	Answers:  A) 73  B) 83  C) 12  D) 83  E) 28
Explanation:   T = 9/45 * 60= 
<gadget id="calculator">9/45 * 60</gadget>
<output>12</output>
12   Answer: Option 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?