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

[EX Q]: Problem: the owner of a furniture shop charges his customer 25 % more than the cost price . if a customer paid rs . 1000 for a computer table , then what was the cost price of the computer table ?
[EX A]: 80

[EX Q]: Problem: the radius of the wheel of a bus is 100 cms and the speed of the bus is 66 km / h , then the r . p . m . ( revolutions per minutes ) of the wheel is
[EX A]: 175

[EX Q]: Problem: if x : y is 1 : 5 and y : z is 5 : 7 then x : z is equal to
[EX A]:
1 : 7