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: ajay can ride 50 km in 1 hour . in how many hours he can ride 1250 km ? 
Options: a ) 10 hrs , b ) 15 hrs , c ) 20 hrs , d ) 25 hrs , e ) 18 hrs
[EX A]: d

[EX Q]: Problem: what is the maximum number of pieces of birthday cake of size 2 ” by 2 ” that can be cut from a cake 20 ” by 20 ” ? 
Options: a ) 5 , b ) 100 , c ) 16 , d ) 20 , e ) 25
[EX A]: b

[EX Q]: Problem: a can do a work in 20 days , b in 30 days . a alone start the work after 10 days he left work . in how many days b can finish the work ? 
Options: a ) 30 days , b ) 25 days , c ) 20 days , d ) 10 days , e ) 15 days
[EX A]:
e