Question

the area of a trapezium shaped field is 480 m2 the distance between two parallel sides is 15 m an one of the parallel side is 20 m .find the other parallel side

Answer 1

Area of Trapezium = 1/2 x sum of parallel sides x perpendicular distance

area = 480 

height of one side = 20 

sum of parallel sides = 15 + x

so,

480 = 1/2 (15 + x) x 20 

480= (15+x) 10

480= 150 + 10x 

480 - 150 = 10x

330 = 10x

330/10 = x

33 = x

Answer 2

Step-by-step explanation:

Area of a trapezium : (sum of parallel sides/2)*height

let other parallel sides be x

so we get,

480 = ({20+x}/2)*15

480/15 ={20+x}/2

(480*2) / 15=20+x

(960/15)-20=x

64-20=x

44=x

other parallel sides =44m