Rahim invested Rs. 5,000 for 6 years in bank A and Rs. 10,000 for 3 years in bank B. Both the banks pay simple interest at the same rate. At the end of the respective tenures, the total amount received by Rahim from the two banks is Rs. 21,000 . What is the annual rate of interest?
1
10%
2
6.67%
3
13.33%
4
15%