1. The diagonal AC of a quadrilateral ABCD is 6cm and the perpendiculars, BM from the vertex B is 3cm and DN from D is 5cm, dropped on the same diagonal. Find the area of the quadrilateral ABCD.
2. The side of a cube is 10m long, Find its surface area.
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Answer:
2) s a.o.c-----6a^2
6*10*10
600
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