Question

solve this as fast as you can

Answer 1

let one side = x
greater side = 40+x
area = 475
height = 19

area = 1/2 (sum of parallel sides) h
475 = 1/2 (40+x+x) 19
475 = 1/2 × 40 + 2x × 19
475 = 20 +2x × 19
475-20 = 2x × 19
455 = 2x × 19
455/19 = 2x
23.9 = 2x
23.9/2 = x
11.9 = x

Other side = 11.9 cm