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Question

A sum of ₹ 69,300 is to be divided between two friends Mahesh and Suresh. They are 11 and 12 years old respectively. Their respective portions are compounded annually at 10% per annum. They will get the same amount when they are 24 years old. Find the share of Suresh.

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Solution

Let the share of Mahesh be x.

Share of Suresh = ₹(69,300x)
Amount received by Mahesh after 13 years(when she will turn 24) = x(1+10100)13

Amount received by Suresh after 12 years(when she will turn 24) = (69,300x)(1+10100)12

As per the question, both of them will get the same amount of money.

So, x(1+10100)13 = (69,300x)(1+10100)12

x(1+10100)=(69,300x)

110x100=69,300x

210x100=69,300

x=33,000

So, share of Mahesh = ₹33,000

Share of Suresh = ₹(69,300- 33,000) = ₹36,300

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