Excluding stoppages, the speed of a train is 45 kmph and including stoppages it is 30 kmph. Of how many minutes does the train stop per hour?  Answers.
A) A)5
B) B)10
C) C)20
D) D)30
E) E)40
Explanation:   T = 15/45 * 60= 
<gadget id="calculator">15/45 * 60</gadget>
<output>20</output>
20   Answer: Option 20
<result>C</result>
Excluding stoppages, the speed of a train is 45 kmph and including stoppages it is 30 kmph. Of how many minutes does the train stop per hour?