the distance between two parallel sides of a trapezium of area 441 sq.cm is 18 cm if one of the sides is 28 cm,find the other side.
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a of trapezium = 1/2 × distance between two parallel sides × (sum of two parallel side)
441= 1/2 × 18 ×( 28 + side 2 )
441= 9 × ( 28+ side 2)
441/9 = 28 + side 2
49 = 28 + side 2
49 - 28 = side 2
21 = side 2
21 is answer
a of trapezium = 1/2 × distance between two parallel sides × (sum of two parallel side)
441= 1/2 × 18 ×( 28 + side 2 )
441= 9 × ( 28+ side 2)
441/9 = 28 + side 2
49 = 28 + side 2
49 - 28 = side 2
21 = side 2
21 is answer
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