If a clock tower is 15 feet tall. How long is its shadow at 60 degree above the horizon. How do you work out the problem?

If a clock tower is 15 feet tall. How long is its shadow at 60 degree above the horizon. How do you work out the problem?
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Answer :

If the angle of elevation is 60 degrees then by using thetangent ratio the length of the shadow is 8.66 feet rounded to twodecimal places.
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