Excluding stoppages, the speed of a train is 60 kmph and including stoppages it is 40 kmph. Of how many minutes does the train stop per hour?	Choices:
A) 12
B) 14
C) 16
D) 18
E) 20
20xplanation:   T = 20/60 * 60= 
<gadget id="calculator">20/60 * 60</gadget>
<output>20</output>
20   Answer: Option 20
<result>E</result>
Excluding stoppages, the speed of a train is 60 kmph and including stoppages it is 40 kmph. Of how many minutes does the train stop per hour?