Area of a trapezium is 686cm². If one of the parallel side is 21cm and distance between parallel sides is 14cm, find other parallel side of trapezium.
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Answer:
77cm
Step-by-step explanation:
Area of trapezium = 1/2 × (sum of parallel sides)×distance between parallel sides
area= 686cm2
Let the other parallel side be a
686=1/2 × (21+a) × 14
686 = 7 × (21+a)
(21+a)= 686/7
21+a = 98
a = 98-21 = 77
a= 77cm
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