A sum of money invested at compound interest amount to rupees 800 in 3 years and 2 Rupees 840 in 4 years find the rate of interest per annum
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Answer:
Step-by-step explanation:
S.I. on Rs. 800 for 1 year = Rs. (840 - 800) = Rs. 40.
Rate = (100*40/80*1)% = 5%
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