Question

3. I borrowed a certain sum at compound interest at the rate of 15% per annum At the end of two years
I paid ? 1290 as interest. How much sum had I borrowed?​

Answer 1

Answer:

p=387

Step-by-step explanation:

sum=?

interest = 1290

rate = 15%p.a.

Time = 2 years

S.I. = p×r×t /100

p×15×2 /100

p×30/100

p×3/10 = 1290

p =3/10×1290

3/1×129 =p

so, p=387