A man sold a radio and a TV set together for Rs. 20,850, thereby making a profit of 20% on the radio and 15% on the TV set. If he had sold them together for Rs. 21,450, then he would have made 15% profit on the radio and 20% profit on the TV set. The cost price of the TV set was:
1
Rs. 18,000
2
Rs. 15,000
3
Rs. 24,000
4
Rs. 20,000