Adam borrowed some money at the rate of 6% p.a. for the first two years, at the rate of 9% p.a. for the next three years, and at the rate of 14% p.a. for the period beyond four years. If he pays a total interest of 11,800 at the end of nine years, how much money did he borrow? Options:	A) 10,421	B) 12,421	C) 14,000	D) 16,000	E) 16,421
Let the sum borrowed be x. Then,   (x×6×21/00)+(x×9×3/100)+(x×14×4/100)= 11800   ⇒ (3⁄25x + 27⁄100x + 14⁄25x) = 11400 ⇒ 95⁄100x = 11800   ⇒ x = (11800×100/95)= 12421   Hence, sum borrowed = 12,421   Answer 12,421
<result>B</result>
Adam borrowed some money at the rate of 6% p.a. for the first two years, at the rate of 9% p.a. for the next three years, and at the rate of 14% p.a. for the period beyond four years. If he pays a total interest of 11,800 at the end of nine years, how much money did he borrow?