The task is to generate the correct answer for a given math problem.

[EX Q]: Problem: robert ' s salary was decreased by 20 % and subsequently increased by 20 % . how much percentage does he lose ?
[EX A]: 4 %

[EX Q]: Problem: ajay can ride 50 km in 1 hour . in how many hours he can ride 1000 km ?
[EX A]: 20 hrs

[EX Q]: Problem: abcd is a square where ab = â ˆ š 4032 . let x be a point on ab and y be a point on cd such that ax = cy . compute the area of trapezoid axyd .
[EX A]:
2016', 'e ) 3000'