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

[EX Q]: Problem: the s . i . on a certain sum of money for 2 years at 8 % per annum is half the c . i . on rs . 4000 for 2 years at 10 % per annum . the sum placed on s . i . is ?
[EX A]: 262

[EX Q]: Problem: at a restaurant , glasses are stored in two different - sized boxes . one box contains 12 glasses , and the other contains 16 glasses . if the average number of glasses per box is 15 , and there are 16 more of the larger boxes , what is the total number of glasses at the restaurant ? ( assume that all boxes are filled to capacity . )
[EX A]: 48

[EX Q]: Problem: what is the rate percent when the simple interest on rs . 810 amount to rs . 155 in 4 years ?
[EX A]:
4.78