Answer:
12 cm
Step-by-step explanation:
The area (A) of a trapezium is calculated as
A = [tex]\frac{1}{2}[/tex] h ( sum of parallel bases ) ← h is the altitude
Here A = 150 and sum of parallel bases = 25, thus
[tex]\frac{1}{2}[/tex] h × 25 = 150 ( multiply both sides by 2 to clear the fraction )
25h = 300 ( divide both sides by 25 )
h = 12