5. The perimeter of a parallelogram is 120m, the distance between a pair of opposite sides is 7 metres and its area is 280 sq m, find the length of two adjacent sides of the parallelogram.
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Answer:
base=area/altitude
280/7=40m
2*(l+b)=120m
8+2b=120
2b=120-8
2b=112
b=112/2
b=56m
the sides are 56m and 40m
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