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# How high is a tree that casts a 35 -ft shadow at the same time a 9 -ft post

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How high is a tree that casts a 35 -ft  shadow at the same time a 9 -ft  post

casts a shadow which is 7 -ft

long?

The tree's height is ___ ft.

I have 57.5 is it came out wrong what should I calculate to get the right answer?

cassie19  Nov 29, 2017

### Best Answer

#2
+82834
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Let H be the tree height....so we have

H / 35  =  9 / 7      multiply both sides by 35

H  =  (35 * 9)  / 7   =  (35/7) * 9  =  5 * 9  =  45 ft

CPhill  Nov 29, 2017
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### 4+0 Answers

#1
0

7/ 9 x 35 =27 2/9 Ft - the height of the tree.

Guest Nov 29, 2017
edited by Guest  Nov 29, 2017
#2
+82834
+3
Best Answer

Let H be the tree height....so we have

H / 35  =  9 / 7      multiply both sides by 35

H  =  (35 * 9)  / 7   =  (35/7) * 9  =  5 * 9  =  45 ft

CPhill  Nov 29, 2017
#3
+1

sorry, got it backwards !!

Guest Nov 29, 2017
edited by Guest  Nov 29, 2017
#4
+6341
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A 9 ft post casts a 7 ft shadow.

A 45 ft tree casts a 35 ft shadow.

hectictar  Nov 29, 2017

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