At what rate of interest per annum the simple interest on a certain sum become 2by 5 times of amount in 10 year at simple interest.
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Int=2/5=0.4 times the sum . So int rate=0.4/10×100=4%
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Step-by-step explanation:
Int=2/5=0.4 times the sum . So int rate=0.4/10×100=4%
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