Question

A meter stick is held perpendicular to the ground. it casts a shadow 1.5 m long. At teh same time, a telephone pole casts a shadow that is 9m long. How tall is the telephone pole?

Answer 1

13.5 meters

Answer 2

how did you get that?

Answer 3

well if look at the meter stick... a meter is is equal to 1 meter, and it's shadow is 1.5 meters...

so the ratio is 1:1.5
^ you can simplify the ratio to:
2:3
^ just divide everything by .5

now if 2:3 equals 9:x

what would x be?
Well.. find half of 9.. which is 4.5 and add that to 9 and you get 13.5.

Answer 4

thanks!!! :)

Answer 5

np :)

Answer 6

\[1/1.5=x/9\rightarrow x=6\]

Answer 7

thanks AA! :)

Answer 8

madscientist had the right idea, but set up one side of the proportion inverted.