The simple interest on a certain sum for 13/4 years at 9/2% pa. is less than that on the same sum
for 2 years at 5% p.a by 1221. Find the sum.
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Answer:
px 13/4 x 9/200-px 2x5/100=122l
117 P/800-10P/100=1221
multiply by 800
117 P-80P =976800
37P=976800
P=976800/37=Rs26400
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