Question

meenakshi deposited a sum of rs.8000 in a bank. After one year she withdraws rs 2000. at the end of 3yrs she received rs.7800. find the rate​

Answer 1

Answer:

if the rate of interest is simple interest .

let the rate of interest be R% per annum.

1st year interest will be calculated on Rs. 8000.

for the next 2 years , interest will be calculated on Rs. 8000 - 2000 = Rs. 6000

therefore interest for the 1st year = 8000*R*1100=80R

interest for the last 2 years = 6000*R*2100=120R/−

total amount paid = 2000+7800 = 9800/-

8000+80R+120R=9800

200R=9800-8000

200R = 1800

R = 1800/200 = 9% per annum

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