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: a girl goes to her school from her house at a speed of 6 km / hr and returns at a speed of 4 km / hr . if she takes 10 hours in going and coming back , the distance between her school and house is 
Options: a ) 12 kms , b ) 16 kms , c ) 20 kms , d ) 24 kms , e ) none of above
[EX A]: d

[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: a man can row upstream at 26 kmph and downstream at 40 kmph , and then find the speed of the man in still water ? 
Options: a ) 22 , b ) 37 , c ) 30 , d ) 33 , e ) 18
[EX A]:
d