In 2014bthe square of Chetan's age was half of his mother's age. If present age of his mother is 5 times of his mother's age(in 2017) then what will his age be in 2020
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In 2014bthe square of Chetan's age was half of his mother's age. If present age of his mother is 5 times of his mother's age(in 2017) then what will his age be in 2020
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Step-by-step explanation:
Let Chetan's age be x, let his mothers age be y
In 2014, x^2=y/2
In 2017, X= 5Y
To convert the variables in 2014 to 2017, X=x+3, Y=y+3
In 2014, (X-3)^2=(Y-3)/2
X^2-6X+9=(Y-3)/2
Since X=5Y, Y=X/5
Therefore, X^2-6X+9=(X/5 -3)/2
X^2-6X+9=X/10-3/2
Multiply by 10 on the equation
10X^2-60X+90= X-15
10X^2-61X+105=0
X+3= Chetan's age in 2020