Question

In simple interest what sum amounts of rs.1120/- in 4 years and rs.1200/- in 5 years? Select one: a. Rs.800 b. Rs. 500 c. Rs. 600 d. Rs. 900

Answer 1

1200 in 5 yrs

1120 in 4 yrs

subtract (1200-1120=80) and 5yrs-4yrs =1yr

so 80 Rs in 1 year as intrest

for 4 yrs intrest is Rs 320 (80*4)

for 5 yrs intrest is Ts 400 (80*5)

subtract 320 from 1120 -->800

or

subtract 400 from 1200 -->800

to get principal.

Answer :800