instruction:
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'.
question:
Problem: in a 80 meters race a beats b by 56 m or 7 seconds . a ' s time over the course is :
Options: a ) 3 seconds , b ) 12 seconds , c ) 10 seconds , d ) 18 seconds , e ) 28 seconds
answer:
a

question:
Problem: how many seconds will a train 250 meters long take to cross a platform 200 meters long if the speed of the train is 90 kmph ?
Options: a ) 18 sec , b ) 15 sec , c ) 21 sec , d ) 16 sec , e ) 20 sec
answer:
a

question:
Problem: 20 men do a work in 20 days . how many men are needed to finish the work in 10 days ?
Options: a ) 50 , b ) 20 , c ) 30 , d ) 10 , e ) 40
answer:
e