Question

a sum amounts of 400 rupees amounts to 440 rupees in 2 years if the rate of interest is increased by 2% per annum it will amount to​

Answer 1

Answer:

448

Step-by-step explanation:

400+5%+2%increase

400+2 annum int. 40 +2 %int. 8= 448

Answer 2

Step-by-step explanation:

P = rs 400

t= 2 yr

r= ?

A = rs 440

therefore , I = 440-400= 40

$r = \frac{i \times 100}{p \times t} \\ \frac{40 \times 100}{400 \times 2} = 5\%$

Rate of interest is increased by 2% per annum

r = 7%

t= 2 yr

p= rs 400

A = p(1+rt/100)

$400(1 + \frac{2 \times 7}{100}) \\ 400( \frac{100 + 14}{100} ) \\ 4 \times 114 = 456$

The p amount to rs 456.