A sum of money at simple interest amounts to Rs. 2240 in 2 years and to Rs. 2600 in 5 years. The sum is:	Choose the correct choice from the following answers
A) rs . 1500	B) rs . 2000	C) rs . 1000	D) rs . 1200	E) rs . 1800

Rationale: "s . i . for 3 years = rs . ( 2600 - 2240 ) = rs . 360 . s . i . for 1 year = rs . 360 / 3 = rs . 120 . s . i . for 2 years = rs . ( 120 x 2 ) = rs . 240 . principal = rs . ( 2240 - 240 ) = rs . 2000 . answer : option b"
Answer: B