At a certain time of day, a person 6 ft tall casts a 4 ft shadow. How long is the shadow cast by a 21 ft tree at the same time?

A. 14 ft
B. 15 ft
C. 12 ft
D. 19 ft

Question

At a certain time of day, a person 6 ft tall casts a 4 ft shadow. How long is the shadow cast by a 21 ft tree at the same time?

 		A.	14 ft
 		B.	15 ft
 		C.	12 ft
 		D.	19 ft

zzr0ck3r · Answer

so we have a ratio of 6::4
we want to keep that ratio 
so 21::? = 6::4

$$\frac{21}{x}=\frac{6}{4}\so\x=\frac{4*21}{6}=?$$

anonymous · Answer

@ ; zzr0ck3r : I think you re fall ...
I have a better way >

anonymous · Answer

21/x - 6/4 ?
Is it true ?

anonymous · Answer

ft tall      6         21
ft show    4         x
4.21/6=84/6=42/3=14

zzr0ck3r · Answer

I think you mean 4*21/6 not 4.21/6

good job, this is the exact same thing I did, but looks very ugly. you right....@E.ali

goformit100 · Answer

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