SOLUTION: no text book Trapazoid: A = 250 sq. m b1 = 20 m h = 10 m Find b2

Algebra ->  Surface-area -> SOLUTION: no text book Trapazoid: A = 250 sq. m b1 = 20 m h = 10 m Find b2      Log On


   

Question 102932: no text book
Trapazoid: A = 250 sq. m
b1 = 20 m
h = 10 m
Find b2
Answer by BurningFlame_marc(77) About Me  (Show Source):
You can put this solution on YOUR website!
Hello!
First of all,we need to know how to get the area of a trapezoid.
A=[(b1+b2)/2]h
Now with that equation we know that
250=[(20+x)/2]10
or you can say that
250=[(20+x)*10]/2
now let's solve for x
250=[(20+x)*10]/2
250=(200+10x)/2
500=200+10x
300=10x
30=x
x=30
Final Answer: 30 m (don't forget to indicate the unit of measure)