Question

4162
1027
What sum of money at compound interest will not to Rs. 6930 in 3 years, if the rate of wateret for
the fast year, 10% for the second year and 20% for the third year?
Rs. 4000
P Rs. 5000
825231162 23
125231162 25
825231162
25
Rs. 5500
Rs. 4500
art for Review & Next
Clear Response
en 375​

Answer 1

Answer:

Principal is ₹ 5000.

Step-by-step explanation:

What sum of money at compound interest will amount to Rs. 6930 in 3 years, if the rate of interest is 5% for the first year, 10% for the second year and 20% for the third year?

Given:

Amount after 3 years = ₹ 6930

Rate of interest for 1, 2 and 3 rd year = 5%, 10% and 20% respectively

Concept used:

Amount = Prinicpal × (1 + r/100)^n

Calculation:

Amount = Principal × (1 + 5/100) × (1 + 10/100) × (1 + 20/100)

₹ 6930 = Principal × 21/20 × 11/10 × 6/5

Then, Principal = 6930 × 20 × 10 × 5/(21 × 11 × 6) = ₹ 5000

∴ Principal is ₹ 5000.