Question

Q.Find the rate of interest when rupees 3200 amount to rupees 3560 in 4 years.​

Answer 1

Answer:

3200*x/100*4=360

128*x=360

x=360/128

x=2.8125 percent

Step-by-step explanation:

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Answer 2

Given: $P=3200, Amount=3560, T=4yrs.$

We have to find the rate of interest.

By using the formula of simple interest i.e.$SI=\frac{P\times R\times T}{100}$

As we know that Amount= P+ S.I.

$\therefore A=P+S.I\\=>3560=3200+S.I.\\=>S.I=3560-3200$

Solving the above equation further we get,

$=>S.I.=360$

Now, $SI=\frac{P\times R\times T}{100}$

$=>360=\frac{3200\times R\times 4}{100} \\\\=>360\times 100=3200\times R\times 4\\=>36000=12800\times R\\\\\\=>R=\frac{36000}{12800}$

Solving the above equation further we get,

$=>R=2.81$%

Hence, the rate of interest will be$2.81$%.