A certain sum amounts to 7400 in 3 yrs and 8600 in 4 yrs. Find the sum and rate of
interest
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Answer: ( d ) Hence, interst in 112years=117
Interest in 1year=1173×2=78
Interest in 2 years=78xx2=156
Principal=(756-156)=600
Required rate%=78600×100=13%
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