Answer :

Given


Let length of first parallel side X


Length of other parallel side is 2X


Area of trapezium= 9450 m2


Let Height (h) =84 m


We know that area of trapezium is × (sum of parallel sides) × height


Therefore Area of trapezium is × (X + 2X) × 84 =9450 cm2.


× (X + 2X) × 84 =9450


(3X) × 42 =9450


126X = 9450


2X + 6 = = 75


X = 17


... Length of the parallel sides is X=75 m and 2X = 150 m.


Therefore length of the longest is 150 m.


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