Suresh borrowed some money at the rate of 6% p.a. for the first three years, 9% p.a. for the next two years and 13% p.a. for the period beyond eight years. If the total interest paid by him at the end of 11 years is Rs.8160, how much money did he borrow?	Select:
A) s.8500
B) s.6000
C) s.10880
D) s.9000
E) s.7000
using the formula S.I=P*T*R/100   (x*6*3/100)+(x*9*2/100)+(x*13*3/100)=8160   x=10880   ANSWER:s.10880
<result>C</result>
Suresh borrowed some money at the rate of 6% p.a. for the first three years, 9% p.a. for the next two years and 13% p.a. for the period beyond eight years. If the total interest paid by him at the end of 11 years is Rs.8160, how much money did he borrow?