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प्रश्न
The interest on a sum of money at the end of 2`1/2` years is `4/5` of the sum. What is the rate per cent?
बेरीज
उत्तर
T = `2 1/2` years
= `5/2` years
S.I. = `4/5` P
R = `("S"."I" xx 100)/("P" xx "T")`
= `(4"P" xx 100 xx 2)/(5 xx "P" xx 5)`
= 32%
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