Question

(5) Principal = 300. Rate = 12% pa. Time = 8 months find simple interest
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Answer 1

$\sf{\underline{\boxed{\mathbb{GIVEN }}}}$

• Principle = Rs. 300
• Rate = 12%
• Time = 8 months = $\dfrac{8}{12}$

$\sf{\underline{\boxed{\mathbb{TO \: FIND }}}}$

• Simple interest ( SI ) = ????

$\sf{\underline{\boxed{\mathbb{SOLUTION}}}}$

$\sf{\underline{\boxed{\bold{ SI = \dfrac{ PRT}{100}}}}}$

$\implies SI = \dfrac{ 300 \times 12 \times 8}{100\times 12}$

$\implies SI = \dfrac{ 300 \times \cancel{12} \times 8}{100\times \cancel{12}}$

$\implies SI = \dfrac{ \cancel{300 } \times 8}{\cancel {100}}$

$\implies SI = 3 \times 8$

$\implies SI = Rs. 24$

$\sf{\underline{\boxed{\mathbb{\dag SI = \: Rs.24 }}}}$

Answer 2

Answer:

Step-by-step explanation:

Simple interest formula is

PxRxT ÷ 100

P is the principal amount, $300.00.

r is the interest rate, 12% per year

t is the time involved, 8....month(s) time periods.

Since your interest rate is "per year" and you gave your time interval in "month(s)" we need to convert your time interval into "year" as well.

Do this by dividing your time, 8- month(s), by 12, since there's 12 months in 1 year.  Basically 12/8

So, t is 0.666667....year time periods.

To find the simple interest, we multiply 300 × 0.12 × 0.666667 to get that:

The interest is: $24.00

Usually now, the interest is added onto the principal to figure some new amount after 8 month(s),

or 300.00 + 24.00 = 324.00