SOLUTION: "A meter stick casts a shadow 0.4 m long and a tree casts shadow 7 m long. Find the height of the tree."

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Question 797204: "A meter stick casts a shadow 0.4 m long and a tree casts shadow 7 m long. Find the height of the tree."
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
Similar triangles.
Upright side = 1 m
Shadow = 0.4 m
Upright side(tree) = x
Shadow = 7 m
1m/x = 0.4 m/7 m
Cross multiply.
0.4x = 7
x = 7/0.4
x = 17.5 m
Tree's height is 17.5 metres.
Hope this helps.
;-)