Ritu is now four times as old as his brother Raju .in 4 years time, age will be twice of Raju's age. What what are their ages in present?
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Let us assume, the present age of Ritu is x years and the present age of Raju is y years.
Given:
x = 4y --------------1
Also given, after 4 years,
x + 4 = 2 ( y + 4)
x + 4 = 2y + 8
x - 2y = 4 -----------------2
Substitute the value of x from equation 1 in equation 2
4y - 2y = 4
2y = 4
y = 2 years
Therefore, x = 4y = 4 * 2 = 8 years
Answer - The age of Ritu is 8 years and the age of Raju is 2 years.
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