Subject: mathqa
Question: rohan spends 40 % of his salary on food , 20 % on house rent , 10 % on entertainment and 10 % on conveyance . if his savings at the end of a month are rs . 500 . then his monthly salary is
Option: 
A: rs . 1500
B: rs . 2500
C: rs . 2000
D: rs . 500
Answer: B