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Let one side of X be X cm
Let one side of Y be y cm
4y + 2x = 80
Since area of X is 1/4 of Y
X^2 = (1/4)Y^2
So X = 0.5Y
Then u use substitution to find X
X = 8cm
So area of X is X times X which is 8x8 = 64cm
Let one side of Y be y cm
4y + 2x = 80
Since area of X is 1/4 of Y
X^2 = (1/4)Y^2
So X = 0.5Y
Then u use substitution to find X
X = 8cm
So area of X is X times X which is 8x8 = 64cm
Thank u