Without stoppages a train travels a certain distance with an average speed of 160 kmph and with stoppages it covers the same distance with an average speed of 80 kmph. What is the time in minutes per hour for which train stops?  Choose the most appropriate option:
A) 10 min/hr  B) 25 min/hr  C) 27 min/hr  D) 30 min/hr  E) 33 min/hr
Pick a smart number for the distance. lets say LCM 160   Without = 160/160= 
<gadget id="calculator">160/160</gadget>
<output>1</output>
1 hours   With= 160/80= 
<gadget id="calculator">160/80</gadget>
<output>2</output>
2 hours   So in a trip of 2 hours, 1 hour is spent in stoppages   Hence, 60/2= 30 min/hr on stoppages   Answer : 30 min/hr
<result>D</result>
Without stoppages a train travels a certain distance with an average speed of 160 kmph and with stoppages it covers the same distance with an average speed of 80 kmph. What is the time in minutes per hour for which train stops?