Question

What sum of money will amount to Rs. 1200 in 4 year at 5% simple interest? ​

Answer 1

Answer:

Rs.1261

Step-by-step explanation:

Clearly, Rate = 5% p.a., Time = 3 years, S.I.= Rs. 1200

So principal=RS [100*1200]/3*5=RS 8000

Amount = Rs. 8000 x [1 +5/100]^3 - = Rs. 9261.

C.I. = Rs. (9261 - 8000) = Rs. 1261.

HOPE IT HELPS YOU!

Answer 2

Question:-

What sum of money will amount to Rs. 1200 in 4 year at 5% simple interest?

Answer:-

The interest of one year

$\sf \implies\pink{\frac{1200 \times 5 \times 1}{100}}$

$\sf\implies\purple {Rs.60}$

Now,

Principle for second year

$\sf\implies\blue {1200 + 60}$

$\sf \implies \green {Rs.1260}$

Further,

The interest for 2nd year

$\sf \implies\red {\frac{1260 \times 5 \times 1}{100}}$

$\sf \implies \orange{Rs.63}$

Now,

Principal for 3rd

$\sf \implies \pink{1260 + 63}$

$\sf \implies\purple {Rs.1323}$

Further,

The interest for 3rd year

$\sf \implies \blue{\frac{1323 \times 5 \times 1}{100}}$

$\sf \implies \green{Rs.66.15}$

Now,

Principal for 4th year

$\sf \implies \red{1323 + 66.15}$

$\sf \implies \orange{Rs.1389.15}$

Further,

The interest for 4th year

$\sf \implies \pink{\frac{1389.15 \times 5 \times 1}{100}}$

$\sf \implies \purple{Rs.69.49}$

Principal after four years

$\sf \implies \blue{1389.15 + 69.46}$

$\sf \implies \green{Rs.1458.61}$

Total compound interest for four years

$\sf \implies \red{1458.61 - 1200}$

$\sf \implies \orange{Rs.258.61}$