In how many years will a sum of money double itself at 10 % p.a interest
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Answer: 10 Step-by-step explanation: Let the sum of money = Rs x Therefore amount = Rs 2x Interest = sum*time*rate of interest/100 = x*time*10/100 Interest = 10x*time/100 Amount = sum + interest 2x = x + 10x*time/100 2x = (100x + 10x*time)/100 200x = 100x + 10x*time 10x*time = 100x time = 100x/10x = 10 years
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