Benton has an extension ladder than can only be used at a length of 10 feet, 15 feet, or 20 feet. He places the base of the ladder 9 feet from the wall and needs the top of the ladder to reach 12 feet.

Which ladder length would Benton need to use to reach this height on the wall?

Question

Benton has an extension ladder than can only be used at a length of 10 feet, 15 feet, or 20 feet. He places the base of the ladder 9 feet from the wall and needs the top of the ladder to reach 12 feet. 

Which ladder length would Benton need to use to reach this height on the wall?

anonymous · Answer

A 20 feet
B 15 feet
C 10 feet

anonymous · Answer

@sajjadahmed

anonymous · Answer

one minute

anonymous · Answer

ok so take a peice of paper and draw a vertical line

anonymous · Answer

|dw:1395627957602:dw|

anonymous · Answer

so solve for    xft which is x feet using the $$a^2 + b^2 = c^2$$

anonymous · Answer

a and b would be the house height and the distance between the end of the ladder touching the ground the the houses wall
just plug it in and solve

anonymous · Answer

@katieeeeeeeee