A sum of money is investedat compound interest payable annyally.The interest into successive year is rupees 225 and rupees 240. find the original sum
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- Interest at the end of 1 year =275 Rs.
- Interest at the end of 2 years =300 Rs.
- Interest for 1 year =300−275=25 Rs.
Rate of interest =
P×R × T
☆ nterest on Rs.225
for one year =
for one year = Rs. 240 - Rs. 225 = Rs. 15
Rate of interest = 100IPT
=100×15225×1=203%=
623%100IPT=100×15225×1=203%
=623%
Interest on the original sum for one year =
Rs.225
Original sum =
100IRT=100×225203×1100IRT=100×225203×1 = Rs.3375
At the end of two years, total amount = 3375 + 225 + 240
☆ = Rs.3840
Interest for 3rd year =
Interest on Rs.3840 for one year
= 3840×203×11003840×203×1100
= Rs.256
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