Kashif and Nadeem jointly started a business. Kashif invested three times as Nadeem did and invested his money for double time as compared to Nadeem. Nadeem earned Rs. 4000. If the gain is proportional to the money invested and the time for which the money is invested then the total gain was?

A. Rs.16000
B. Rs.20000
C. Rs.24000
D. Rs.28000

Explanation:

3:1

2:1

——

6:1

1 —– 4000

7 —– ? => Rs.28,000