Question
The figure shows a rectangle WXYZ. The lines are extended from point W, X, Y and Z and they meet at point B. The length of YZ is 21 cm. Given that the area of triangle WBZ is 69 cm2 and the area of triangle XBY is 102 cm2, find the breadth of the rectangle in mixed number.
4 m

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The figure shows a rectangle WXYZ. The lines are extended from point W, X, Y and Z and they meet at point B. The length of YZ is 21 cm. Given that the area of triangle WBZ is 69 cm2 and the area of triangle XBY is 102 cm2, find the breadth of the rectangle in mixed number.