SOLUTION: The floor of a rectangular deck has an area of 600 sq. ft. The floor is 20 ft. wide. How long is the floor? A. 20 ft. B. 30 ft. C. 15 ft. D. 45 ft.

Algebra ->  Customizable Word Problem Solvers  -> Geometry -> SOLUTION: The floor of a rectangular deck has an area of 600 sq. ft. The floor is 20 ft. wide. How long is the floor? A. 20 ft. B. 30 ft. C. 15 ft. D. 45 ft.      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 939151: The floor of a rectangular deck has an area of 600 sq. ft. The floor is 20 ft. wide. How long is the floor?
A. 20 ft.
B. 30 ft.
C. 15 ft.
D. 45 ft.
Found 2 solutions by MathLover1, ewatrrr:
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

the area of the floor is A=L%2AW
if the floor of a rectangular deck has an area of A=600ft%5E2 and the floor is W=20ft wide, then we have
L%2AW=600ft%5E2
L%2A20ft=600ft%5E2
L=60cross%280%29ft%5Ecross%282%29%2F2cross%280%29cross%28ft%29
L=60ft%2F2
L=30ft
so, answer is B. 30ft


Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

     .

A = Lw 

L(20ft) = 600ft^2

L = 600ft^2/(20ft) = 30ft