Question

The area of trapezium is 475 cm Square and its height is 19 cm find the length of its two parallel sides if one side is 40 cm greater than the other

Answer 1

area=475cm square
height=19cm
one side =40cm
another side=?
area=1/2*height*(a+b)
9.5*(40+b)=475
40+b=475/9.5
50=40+b
50-40=b
b=10