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(B) By the property of a rectangle,opposite sides are equal.For lengths: $x + 3y = 13$  --- $(i)$For breadths: $3x + y = 7$  --- $(ii)$To solve this p

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$1, 4$

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(B) By the property of a rectangle,opposite sides are equal.For lengths: $x + 3y = 13$  --- $(i)$For breadths: $3x + y = 7$  --- $(ii)$To solve this pair of linear equations,multiply equation $(ii)$ by $3$:$9x + 3y = 21$  --- $(iii)$Now,subtract equation $(i)$ from equation $(iii)$:$(9x + 3y) - (x + 3y) = 21 - 13$$8x = 8$$x = 1$Substitute $x = 1$ into equation $(i)$:$1 + 3y = 13$$3y = 12$$y = 4$Thus,the required values are $x = 1$ and $y = 4$.

Find the values of $x$ and $y$ in the following rectangle.

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