Judy lies on the ground 45 feet from her tent. Both the top of the tent and the top of a tall cliff are in her line of sight Her tent is 10 feet tall. About how is the cliff? Assume the two triangles are similar.

Postscript: The distance from the tent to the cliff is 400 feet. (for those of you that have Stretching and Shrinking 7th grade math book, it is question 25 on page 68)