Answer:
9cm
Step-by-step explanation:
Area of trapezium=(1/2)×(a+b)h
A=33
a=2
b=?
h=6
(1/2)(2+b)(6)=33
(1/2)(12+6b)=33
6+3b=33
3b=33-6
3b=27
b=27÷3
b=9
