Question

 at what rate percent perannum will 6000 amountto 6615 in 2 years when interest is compounded annually

Answer 1

Principle= Rs 6000, Amount= Rs 6615
Simple Interest (S.I.) = Rs (6615-6000) = Rs 615
Now,
S.I.= Rs 615, Time = 2 years, Principle = Rs 6000, Rate = ?
Formula Used:
S.I.=$\frac{P×R×T}{100}$

615= $\frac{6000×R×2}{100}$

⇒120R= 615

⇒R= $\frac{615}{120}$
⇒R = 5.125% per annum.

Hence,  The rate of Interest is 5.125% per annum.

Answer 2

Answer:

r=5%

Step-by-step explanation:

amount=Rs.6615

principal=Rs.6000

time=2 year

rate=?

amount=principal (1+r/100)^t

6615=6000(1+r/100)^2

6615/6000=(1+r/100)^2

441/400=(1+r/100)^2

(21/20)^2=(1+r/100)^2

on comparing

21/20=1+r/100

21/20 -1=r/100

1/20=r/100

r=100/20

r=5%

I hope this helps you