If Rs.64 amounts to Rs.83.20 in 2 years, what will Rs.86 amount to in 4 years at the same rate per cent Simple Interest per annum?
let the rate of interest = R%
according to the question
interest in 2 years = 83.20 - 64 = 19.20
$$ SI = \frac{PNR}{100} $$
$$ R = \frac{SI \times 100}{PT} $$
     = $$ \frac{19.20 \times 100}{64 \times 2} = 15 $$%
amount of Rs 86 will be in 4 years by 15% rate of interest
$$ SI = \frac{86 \times 15 \times 4}{100} = 51.6 Rs $$
amount = principal + SI
86 + 51.6 = 137.6 Rs
Create a FREE account and get:
