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1) At 1 pm the shadow of a tree is 14 feet long. At the same time the shadow of a 18 foot telephone pole is 21 feet long. What is the height of the tree? A) 9 feet B) 12 feet C) 18 feet D) 22 feet
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Mar 28, 2019
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1)
At 1 pm the shadow of a tree is 14 feet long. At the same time the shadow of a 18 foot telephone pole is 21 feet long. What is the height of the tree?
A) 9 feet
B) 12 feet
C) 18 feet
D) 22 feet
Mathematics
high-school
Jeff Grigg
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Jeff Grigg
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set up a ratio:
telephone pole = 18ft high / 21ft shadow
tree = x ft high / 14 ft shadow
18/21 = x/14
cross multiply 18 x 14 = 252
21 x x = 21x
x = 252 / 21
x = 12
the tree is 12 feet tall
Answer is B
AntoineMoPa
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Apr 4, 2019
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AntoineMoPa
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