SOLUTION: The foot of a ladder is placed 6 feet from a wall. If the top of the ladder rests 8 feet up on the wall, how long is the ladder?

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Question 254189: The foot of a ladder is placed 6 feet from a wall. If the top of the ladder rests 8 feet up on the wall, how long is the ladder?
Found 2 solutions by solver91311, nerdybill:
Answer by solver91311(24713) (Show Source):
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That would depend on whether or not the wall and the ground form a perfect right angle. Based on that presumption, you can proceed one of two ways:

You have a right triangle with legs of 6 and 8, so the hypotenuse, which is the length of the ladder is given by:

Or you could note that 6 is 2 times 3 and 8 is two times 4, so you have a right triangle with legs in the proportion 3:4 which means the hypotenuse must be in proportion 3:4:5, hence 2 times 5 is 10 which is the length of the ladder.

John

Answer by nerdybill(7384) (Show Source):
You can put this solution on YOUR website!
The foot of a ladder is placed 6 feet from a wall. If the top of the ladder rests 8 feet up on the wall, how long is the ladder?
.
Applying Pythagorean theorem we have:
Let x = length of the ladder
then
x^2 = 6^2 + 8^2
x^2 = 36 + 64
x^2 = 100
x = 10 feet