In simple interest what sum amounts of Rs.1120/-in 4 years and Rs.1200/-in 5 years ?	Choices:	A) rs . 500	B) rs . 600	C) rs . 800	D) rs . 900	E) rs . 700

Rationale: for 1 year interest = 1200 - 1120 = 80 for 4 year 320 then sum = 1120 - 320 = 800 answer : c
Answer: C