Question

a sum of money put at 9% per annum simple interest amount to 10160 in 3 years. What will it amount to in 2 years at 8% per annum​

Answer 1

Answer:

Find the interest percentage earned in 3 years:

1 year = 9%

3 years = 9 x 3 = 27%

Find the principal amount:

Interest = 27%

Percentage of money with interest = 100 + 27 = 127%

Sum of money with interest = Rs 10160

127%= rs 10160

1% = $\frac{10160}{127} = rs80$

100 = Rs 80 x 100 = Rs 8000

Find the interest for 2 years at 8% per annum:

$1 year = 8% x 8000 = 0.08 x 8000 = Rs 6402 years = 640 x 2 = Rs 1280$

Find the amount after 2 years:

Total amount = $Rs 1280 + Rs8000 = Rs 9280$