a farmer Deepesh a loan of rupees 3250 by paying 305 in the first month and then decreases the payment by rupees 15 every month how long will it take to clear his loan
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Sum = 3250
n2[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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