Question
The simple interest on a certain sum of money at the rate of 5% p.a. for 8 years is Rs. 840. At what rae of interest he same amount of interest can be received on he same sum after 5 years ?
Answer: Option B
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S.I. = Rs. 840, R = 5%, T = 8 years
principal = Rs.`((100 xx 840)/(5 xx 8))` = Rs. 2100
Now , P = 2100, S.I. = Rs. 840, T = 5 years
`:.` Rate = `((100 xx 840)/(2100 xx 5))`% = 8%
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