Question

At what rate percent per annum a sum of money will double itself in 10 years?

Answer 1

The rate percent per annum is 7.2%.

Step-by-step explanation:

The formula o compute the amount is:

$A=P[1+\frac{r}{100}]^{t}$

The information provided is:

P = Rs. x

A = 2P = Rs. 2x

t = 10 years.

Compute the value of r as follows:

$A=P[1+\frac{r}{100}]^{t}\\2x=x\times [1+\frac{r}{100}]^{10}\\2=[1+\frac{r}{100}]^{10}\\(2)^{1/10}=[1+\frac{r}{100}]\\1.072=1+\frac{r}{100}\\\frac{r}{100}=0.072\\r=7.2\%$

Thus, the rate percent per annum is 7.2%.

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Answer 2

Answer:

answer is 10% okk.............

p= ₹ x

R = ?

T = 10 years

A= 2 times of =₹ x =₹ 1x

R = S.I* 100/ x * 10

= 10 years