A sum was lent at simple interest at a certain rate for 2 years. Had it been len

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A sum was lent at simple interest at a certain rate for 2 years. Had it been lent at 3% higher rate, it would have fetched Rs.300 more. The original sum of money was :

Options:

A . Rs.6000

B . Rs.5000

C . Rs.4000

D . Rs.7000

Answer: Option B
Answer: (b)If the principal be x, then${x × 3 × 2}/100 = 300$$x = {300 × 100}/{3 × 2}$ = Rs.5000Using Rule 13.$P_1 = P, R_1 = R, T_1$ = 2.$P_2 = P, R_2 = R + 3, T_2$ = 2.S.I.= Rs.300300 = ${P × (R + 3) × 2 - PR2}/100$300 = ${6P}/100$ = Rs.5000

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