Dalajit lent ₹ 10800 to Jaabir for 3 years an | vedclass

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(C) Let the rate of interest be $r \%$ per annum.Simple interest is calculated using the formula: $SI = \frac{P 	imes R 	imes T}{100}$.For Jaabir: P

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$3$

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(C) Let the rate of interest be $r \%$ per annum.Simple interest is calculated using the formula: $SI = \frac{P 	imes R 	imes T}{100}$.For Jaabir: Principal $P_1 = ₹ 10800$,Time $T_1 = 3$ years,Rate $= r \%$.$SI_1 = \frac{10800 	imes r 	imes 3}{100} = 324r$.For Kabir: Principal $P_2 = ₹ 7500$,Time $T_2 = 2$ years,Rate $= r \%$.$SI_2 = \frac{7500 	imes r 	imes 2}{100} = 150r$.Total interest received $= SI_1 + SI_2 = 1422$.$324r + 150r = 1422$.$474r = 1422$.$r = \frac{1422}{474} = 3$.Therefore,the rate of interest is $3 \%$ per annum.

Dalajit lent ₹ $10800$ to Jaabir for $3$ $years$ and ₹ $7500$ to Kabir for $2$ $years$ on simple interest and received ₹ $1422$ in all from both of them as interest. The rate of interest (in $\%$) per annum is

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