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(A) The formula for simple interest is $SI = \frac{P 	imes R 	imes T}{100}$.Given that the amount $A = P + SI = 2750$,$R = 5 \%$,and $T = 2 	ext{ y

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$6$

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(A) The formula for simple interest is $SI = \frac{P 	imes R 	imes T}{100}$.Given that the amount $A = P + SI = 2750$,$R = 5 \%$,and $T = 2 	ext{ years}$.$2750 = P + \frac{P 	imes 5 	imes 2}{100} = P(1 + 0.1) = 1.1P$.$P = \frac{2750}{1.1} = 2500$.Now,we need to find the rate $R'$ such that the interest $SI = 300$ for $T = 2 	ext{ years}$ on the same principal $P = 2500$.$300 = \frac{2500 	imes R' 	imes 2}{100}$.$300 = 50 	imes R'$.$R' = \frac{300}{50} = 6 \%$.Thus,the required rate is $6 \%$.

$A$ sum of money invested at simple interest for two years at $5 \% \text{ p.a.}$ amounted to $Rs. 2750$. The rate at which the sum should have been invested to get $Rs. 300$ as interest after two years would be (in $\%$)?

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