Question

at what rate percent annum will rupees 2500 amount to rs 3300 in 4 years
answer is 8% please give solution please ​

Answer 1

Answer:

Interest earned in 4 years= 3300- 2500= 800

Interest earned in 1 year= 800÷4= 200

%age = (200÷2500)×100

=8%

Answer 2

Step-by-step explanation:

$\bf\underline{\underline{\red{Given:-}}}$

• Principal = Rs. 2500

• Amount = Rs. 3300

• Time = 4 years

$\bf\underline{\underline{\blue{To\: Find:-}}}$

• The rate of interest.

$\bf\underline{\underline{\green{Solution:-}}}$

To find the Rate percent , first we need to find the Simple Interest (SI)

The formula for finding Simple Interest, when Principal and Amount are given is:-

$\boxed{\rm \leadsto SI = Amount - Principal}$

= 3300 - 2500

= 800

$\implies \underline{ \underline{ \: \: \: \rm Simple \: Interest =Rs. 800 \: \: \: \: }}$

Now:-

We need to find the Rate %

As we know that the formula for finding Simple Interest is:-

$\rm SI =\dfrac{P\times T\times R}{100}$

$\boxed{\rm \leadsto R = \dfrac{SI \times 100}{P \times T}}$

Here:-

• SI = Rs. 800

• P = Rs. 2500

• T = 4 years

Substituting the values:-

$\rm \implies R = \dfrac{800\times 100}{2500 \times 4}$

$\rm \implies R= \dfrac{80000}{10000 }$

$\rm \implies R= \dfrac{80000}{10000}$

$\rm \implies R= 8$

$\underline{\boxed{\purple{\rm \therefore Rate\: of \: interest = 8\%}}}$