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 Class 7 Mathematics Length, Perimeter and Area: Length and its Operations

In the quadrilateral EFGH drawn below, line EF is parallel to GH. The dotted line JG is the perpendicular height. The area of the quadrilateral is 3600# m^2#.
figperimeter18520201606.JPG
What is the length of line EF?
A. 72 m
B. 75 m
C. 90 m
D. 120 m

 (1m 57s)
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