Excluding stoppages, the speed of a train is 42 kmph and including stoppages it is 36 kmph. Of how many minutes does the train stop per hour?
Choose the correct choice from the following choices:	A) 7.5	B) 8.5	C) 9.5	D) 4.5	E) 6.5
T = 6/42 * 60 = 8.5   ANSWER:8.5
<result>B</result>
Excluding stoppages, the speed of a train is 42 kmph and including stoppages it is 36 kmph. Of how many minutes does the train stop per hour?