10 feet

# Joe, Who Is 5 Feet 6 Inches Tall, Casts A Shadow 11 Feet Long. The Shadow Of A Nearby Tree Is 20 Feet Long. How Tall Is The Tree?

I would use ratios.

Let x=height of the tree

FYI 5'6" is = 5.5' (6"/12"=.5)

5.5/11=20/x

Cross multiply

5.5x = 20x11

divide both sides by 5.5

x=20x11/5.5

solve for x and get 40

therefore The Tree is 40' Tall

for downloadable math lessons you might want to have a look at Math Made Simple

Let x=height of the tree

FYI 5'6" is = 5.5' (6"/12"=.5)

5.5/11=20/x

Cross multiply

5.5x = 20x11

divide both sides by 5.5

x=20x11/5.5

solve for x and get 40

therefore The Tree is 40' Tall

for downloadable math lessons you might want to have a look at Math Made Simple

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