Posted by Awesome1 on Sunday, February 20, 2011 at 2:38pm.
A flagpole is 20 feet tall and, in the afternoon, casts a shadow of 30 feet. At the same time, Keira casts a shadow of 7.5 feet. How tall is Keira? A. 3 feet. B. 4 feet. C. 5 feet. D. 5 feet

Math  MathMate, Sunday, February 20, 2011 at 2:49pm
20' high : 30' shadow
? high : 7.5' shadow
This is a problem of direct proportions, the taller the object, the longer the shadow.
Keira's height can be found by cross multiplication,
H = 20*7.5/30 = 5 feet.
Also, please refrain from double posting the same problem within a short time. Allow some time for tutors to look at the problem.
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