What is the rate percent when the simple interest on Rs.1000 amount to Rs.400 in 4 Years?
Choose the correct answer:
A) 5 %	B) 6 %	C) 2 %	D) 95 %	E) 10 %

Rationale: "interest for 4 yrs = 400 interest for 1 yr = 100 interest rate = 100 / 1000 x 100 = 10 % answer : e"
Answer: E