Ram borrowed some money at the rate of 6% p.a. for the first three years, 8% p.a.for the next six years and 10% p.a.for the period beyond nine years If the total interest paid by him at the end of 12 years is 19200, how much money did he borrow? Choose one
A) 18,000
B) 10,000
C) 25,000
D) 20,000
E) None of these
Let the sum be x. Then,   (x×3×6/100)+(x×6×8/100)+(x×3×10/100)=19200   ⇒ 18x + 48x + 30x = (19200 × 100)   ⇒ 96x = 1920000   ⇒ x = 20000.   Answer 20,000
<result>D</result>
Ram borrowed some money at the rate of 6% p.a. for the first three years, 8% p.a.for the next six years and 10% p.a.for the period beyond nine years If the total interest paid by him at the end of 12 years is 19200, how much money did he borrow?