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'.

[EX Q]: Problem: what percent of a day is 7 hours ? 
Options: a ) 29.2 % , b ) 12.5 % , c ) 13 % , d ) 11.3 % , e ) none of these
[EX A]: a

[EX Q]: Problem: cole drove from home to work at an average speed of 60 kmh . he then returned home at an average speed of 90 kmh . if the round trip took a total of 2 hours , how many minutes did it take cole to drive to work ? 
Options: a ) 66 , b ) 70 , c ) 72 , d ) 75 , e ) 78
[EX A]: c

[EX Q]: Problem: walking at 5 / 6 of its usual speed , a train is 10 minutes too late . find its usual time to cover the journey . 
Options: a ) 50 min , b ) 20 min , c ) 1 hour , d ) 30 min , e ) 45 min
[EX A]:
a