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# Fun quiz

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Two flagpoles stand side by side. The first flagpole is 50 feet tall. The second flagpole is as tall as the first flagpole's shadow is long. The second flagpole's shadow is 18 feet long. How many feet tall is the second flagpole?

Guest Jan 6, 2018

#1
+5888
+1

50 / x   =   x / 18

Multiply both sides of the equation by  18 .

900 / x   =   x

Multiply both sides by  x .

900   =   x2

Take the positive, since  x  is the height of a flagpole, square root of both sides.

30   =   x

The second flagpole is  30  ft tall.

hectictar  Jan 6, 2018
Sort:

#1
+5888
+1

50 / x   =   x / 18

Multiply both sides of the equation by  18 .

900 / x   =   x

Multiply both sides by  x .

900   =   x2

Take the positive, since  x  is the height of a flagpole, square root of both sides.

30   =   x

The second flagpole is  30  ft tall.

hectictar  Jan 6, 2018

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