Question

A farmer repays a loan of rs 3250 by paying rs 305 in first month and then decreases payment by rs 15 every month. How long will it take to clear his loan

Answer 1

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$<b>{Sum = 3250 n2[40+(n−1)×15]=3250n2[40+(n−1)×15]=3250 on simplifying we get, 15n2+25n−6500⟹3n2+5n−1300⟹(n−20)(3n+65)∴n=0=0=0=20}$

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