Question

A certain sum of money amounts to
Rs.8,880 in 6 years and Rs.7,920 in 4
years respectively. Find the principal
and rate percent.​

Answer 1

Answer:

Hey friend here is your answer......

Solution :

Amount at the end of 6 years = Principal + interest for 6 years

Amount at the end of 4 years = Principal + interest for 4 years

Interest at the end of 2 years = ₹960

Interest at the end of 1st year

Interest at the end of 4 years = 480 X 4

Principal = ₹6,000

Hope it helps you......

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Answer 2

Answer:

Rate of interest is 8%

Step-by-step explanation:

Let Amount for 6 years, Amount for 4 years Principal and Simple interest be $A^{6}$, $A^{4}$ , P, S

1. Amount for 6 years =  P+6S=8880

2. Amount for 4 years =  P+4S=7920

1 minus 2===         2S= 980 ===S=480 and

Sub S in above and will get P=6000 Rs

PNR /100=SI ==> 6000x6xR/100=2880

R=8%