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

anonymous · Answer

Think of a triangle.  6 feet and 4 feet are your height and base leg, respectively.  Calculate the angle where the sun would be, and then use that angle with a new height of 21 feet to get your new base leg.

anonymous · Answer

Don't get it

anonymous · Answer

let 6 feet be your height and 4 feet ur horizontal distabce|dw:1349378285597:dw| u can now find ur angle using tangent function
since the time is the same ur angle is the same now change ur 6 by 21 and find ur new shadow.... got that ?@BacardiDavis