Find the rate of interest when .
Rs 300 amounts to rs 400 in 2 years .

Find the rate of interest when . Rs 1200 amounts to Rs 1320 in 2 years

If Rs. 3,750 amount to Rs. 4,620 in 3 years at simple interest. Find : (i) the rate of interest. the amount of Rs. 7,500 in 5""1/2 years at the same rate of interest.

Find the rate of interest when : simple interest on Rs 1625 in 2 1/2 years is Rs 325 .

Find the rate percent per annum if Rs 2000 amount to Rs 2662 in 1.5 years, interest being compounded half-yearly?

At what rate percent will a sum of Rs 1000 amount to Rs 1102.50 in 2 years at compound interest?

Find the rate percent per annum, if Rs 2000 amount to Rs 2315.25 in an year and a half, interest being compounded six monthly.

At what rate per cent per annum simple interest will Rs. 66000 amount to Rs. 72720 in 2 years?

At what rate percent compound interest per annum will Rs 640 amount to Rs 774.40 in 2 years?

At what rate per cent per annum will Rs 6,000 amount to Rs 6,615 in 2 years when interest is compounded annually ?

Find the interest and the amount on : Rs. 2,600 in 2 years 3 months at 1% per month.