A sum of money lent out at c.i. at a certain rate per annum becomes 3 times of itself in 8 years. Find in how many years will the money become 27 times of itself at the same rate.
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3 times = 8 years
27 = 3×9 = x= 8×9= 72 years
hence in takes 72 years to make it 27 times
27 = 3×9 = x= 8×9= 72 years
hence in takes 72 years to make it 27 times
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