
Some amount out of Rs. 7000 was lent at 6 % p.a. and the remaining at 4 % p. a. If the total simple interest from both the fractions in 5 years was Rs. 1600, the sum lent at 6 % p. a. was —

 Rs. 2000
 Rs. 5000
 Rs. 3500
 None of these
 Rs. 2000
Correct Option: A
According to question ,
Average annual rate =  ×  %  
7000  5 
Average annual rate =  %  
7 
∴ (Amount at 6%) : (Amount at 4%) =  :  = 2 : 5  
7  7 
∴ Sum lent at 6% = Rs.  700 ×  
7 
Hence, Sum lent at 6% = Rs. 2000.