The area of trapezium whose parallel sides are 57 cm and 39 cm and the distance between them is 28 cm is
Let 'a' and 'b' be the parallel sides of the trapezium and 'h' be the height of the trapezium
Area of trapezium =12(sum of parallel sides)×height
⇒12(a+b)×h=12(57+39)×28=1344 cm2