Question

The difference between si and ci on a sum of money for 2 years is Rs. 15. The si on the same sum for 4 years is Rs. 1200. Find the sum and rate of interest​

Answer 1

Given :-

• The difference between SI and CI on a sum of money for 2 years is Rs. 15.
• The SI on the same sum for 4 years is Rs. 1200.

To Find :-

• Find the sum and rate of interest ?

Solution :-

we know that,

• First year SI = First year CI .
• SI is same in each year.

so,

→ 4 years SI = Rs.1200

→ 1 year SI = 1200/4 = Rs.300

then,

→ 1st year SI = 1st year CI = Rs.300

and,

→ 2nd year CI - 2nd year SI = Rs.15 (given)

→ 2nd year CI = 15 + 2nd year SI

→ 2nd year CI = 15 + 300

→ 2nd year CI = Rs.315 .

therefore,

→ Rate = (15 * 100) / 300 = 5% per annum (Ans.)

hence,

→ Principal = (SI * 100) / (R * T)

→ P = (300 * 100) / (5 * 1)

→ P = Rs.6000 (Ans.)

Learn more :-

CI in 2yr is Rs. 1600 and in 3 yrs it will be Rs. 1700. Find the rate of interest.

https://brainly.in/question/32463301