Question

Find the rate of interest : Principal = 200, SI = 40, Time = 4year​

Answer 1

Answer:

here your answer

Step-by-step explanation:

hope it helped you.

Answer 2

Answer :-

• The rate of interest is 5% per annum.

To find :-

• The rate of interest.

Step-by-step explanation :-

• Let's find the rate of interest since the simple interest, principal and time have been given to us.

We know that :-

$\underline{ \boxed{ \sf SI = \dfrac{Principal \times Rate \times Time}{100}}}$

Here,

• Simple interest = Rs 40.
• Principal = Rs 200.
• Time = 4 years.

• Let the rate of interest be r.

Substituting the given values in this formula,

$\rm 40 = \dfrac{200 \times r \times 4}{100}$

Multiplying 200 with 4,

$\rm40 = \dfrac{800\times r}{100}$

Multiplying 800 with r,

$\rm40 = \dfrac{800r}{100}$

Transposing 100 from RHS to LHS, changing it's sign,

$\rm40 \times 100 = 800r$

Multiplying 40 with 100,

$\rm4000 = 800r$

Transposing 800 from RHS to LHS, changing it's sign,

$\rm \dfrac{4000}{800} = r$

Dividing 4000 by 800,

$\overline{ \boxed{ \rm5\% = r}}$

• Hence, the rate of interest is 5% per annum.

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