In this task, you need to answer the given multiple-choice question on the physics. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

Q: Problem: excluding stoppages , the speed of a train is 30 kmph and including stoppages it is 21 kmph . of how many minutes does the train stop per hour ? 
Options: a ) 16 , b ) 17 , c ) 12 , d ) 15 , e ) 18

A: e
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Q: Problem: debony normally drives to work in 45 minutes at an average speed of 40 miles per hour . this week , however , she plans to bike to work along a route that decreases the total distance she usually travels when driving by 20 % . if debony averages between 12 and 16 miles per hour when biking , how many minutes earlier will she need to leave in the morning in order to ensure she arrives at work at the same time as when she drives ? 
Options: a ) 135 , b ) 105 , c ) 95 , d ) 75 , e ) 45

A: d
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Q: Problem: a train 360 m long is running at a speed of 72 km / hr . in what time will it pass a bridge 140 m long ? 
Options: a ) 40 sec , b ) 29 sec , c ) 25 sec , d ) 27 sec , e ) 34 sec

A:
c
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