The area of a trapezium is 34 cm and the length one of its parallel side is

10.4cm and its height is 4cm. Find the length of the other parallel side.

6.6 cm.

Step-by-step explanation:

The area of a trapezium A = (h/2) (a + b) where h = the height, a and b are the length of the parallel sides.

So substituting the given values in this formula:

34 = (4/2) (10.4 + b)

34 = 2 (10.4 + b

34 = 20.8 + 2b

2b = 34 - 20.8 = 13.2

b = 6.6 cm.