Question

A sum when reckoned at 15/2 per annum amounts to 3920 in three years find the sum​

Answer 1

Answer:

Let the sum be x.

And amount is 3920.

Rate is 15% per annum.

2

Time is 3 years.

Amount = P×R×T

100

3920 = x×15×3

2×100

3920 = x×15×3

200

3920 = x×3×3

40

3920×40 = 9x

156800 = 9x

156800 = x

9

17422.22 =x

So, the Sum = Rs17422.22 [If this question is of -imple interest ]

Let the sum be x.

And amount is 3920.

Rate is 15% per annum.

2

Time is 3 years.

Amount = P×(1+ R )

100

3920 = x×(1+ 15 )

2×100

3920 = x×(1+ 3 )

2×20

3920 = x×( 40 + 3 )

40

3920 = 43x

40

3920×40 = x

43

156800 =x

43

3646.511 =x

So, the Sum = Rs3646.511 [If the question is of -compound interest. ]