Question
The figure shows a rectangle YZAB. The lines are extended from point Y, Z, A and B and they meet at point D. The length of AB is 21 cm. Given that the area of triangle YDB is 56 cm2 and the area of triangle ZDA is 147 cm2, find the breadth of the rectangle in mixed number.
4 m

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The figure shows a rectangle YZAB. The lines are extended from point Y, Z, A and B and they meet at point D. The length of AB is 21 cm. Given that the area of triangle YDB is 56 cm2 and the area of triangle ZDA is 147 cm2, find the breadth of the rectangle in mixed number.