Subject: mathqa
Question: a trader purchased two colour televisions for a total of rs . 35000 . he sold one colour television at 30 % profit and the other 40 % profit . find the difference in the cost prices of the two televisions if he made an overall profit of 30 % ?
Option: 
A: rs . 20985
B: rs . 21000
C: rs . 28985
D: rs . 40985
Answer: A