A sum of money at simple interest amounts to Rs. 815 in 3 years and to Rs. 854 in 4 years. Find the original sum of money. [2 MARKS]

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Solution

Concept : 1 Mark
Calculation : 1 Mark

S.I. for 1 year = Rs. (854 - 815) = Rs. 39.

S.I. for 3 years $= R s . (39 \times 3) = R s . 117$ .

Principal = Rs. (815 - 117) = Rs. 698.

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