Question

At what rate of simple interest per annum, does the interest on Rs. 1200 in 2 years equals the interest on Rs. 600 at 4 years at `(7)/(2)%` per annum ?
A. `(3)/(4)%`
B. `(7)/(2)%`
C. `(4)/(3)%`
D. `(7)/(8)%`

Answer 1

Correct Answer - B
Use formula for simple interest
`(ii) (1200xx2xx r)/(100)=(600xx4xx7)/(2xx100)`, find r.