Question

The area of a trapezium shaped field is 600 m², the distance between two parallel sides is 10 m and one of the parallel side is 20 m. Find the other parallel side.

• A. $40m$
• B. $50m$
• C. $60m$
• D. $70m$

Answer 1

The correct option is A

$40m$

Let the parallel sides of the trapezium be a and b.
One of the sides is 20 m and the distance between two parallel lines is 15 m.

The area of trapezium
$=\frac{1}{2}\times$ Sum of the length of the two parallel lines $\times$ distance between two parallel lines

600 = $\frac{1}{2}$ (a + b) × 10

a + b = 60

b = 60 – 20 = 40 m

Length of the other parallel side = 40 m