The length of the parallel sides of trapezium are in ratio 4 is to 7 is the height of trapezium is 14 M and its area is 385 square metre find the length of its parallel sides
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area=0.5(a+b)h
given a/b=4/7
a=4b/7
385=0.5((4b/7)+b)14
b=35
a=4b/5
a=20
lengths of 2 parllelo sides r 35,20
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