At what rate percent per annum will the simple interest on a sum of money be `2/5` of the amount in 10 years? (a) 4% (b) `5 2/3%` (c) `6%` (d) `6 2/3%`

At what rate percent per annum simple interest will a sum double itself in 10 years? (a) 8% (b) 10% (c) 12% (d) 12 1/2%

At which rate percent per annum simple interest will a sum triple itself in 16 years? (a) 12% (b) 10.5% (c) 11.5% (d) 12.5%

What sum lent out at 3% per annum simple interest would produce Rs 225 as interest in 5 years?

At what rate of compound interest per annum will a sum of Rs 1200 become Rs 1348.32 in 2 years? (a) 7.5% (b) 6.5% (c) 7% (d) 6%

The simple interest on a sum of money for 2 years at 4% per annum is Rs. 340.Find the sum of money?

A sum when reckoned at 6% per annum simple interest amounts to Rs. 4130 in 3 years. Find the sum.

The simple interest on a sum of money for 2 years at 4% per annum is Rs 340. Find : the sum of money and

The simple interest on a certain sum of money at the rate of 5% p.a. for 8 years is Rs 840. At what rate of interest the same amount of interest can be received on the same sum after 5 years? (a) 6% (b) 8% (c) 9% (d) 10%