Question

A person 4 feet tall casts a 9 foot shadow at the same time that a nearby tree casts a 21 foot shadow. What is the height of this tree?

Answer 1

the tree is 9 1/2 feet tall

Answer 2

How did you solve this

Answer 3

My way is silly, and probably a little basic, but ill try to explain.
First: add the height of the person and their shadow twice.
Second: now we know that the height of the tree is taller than 8 ft. , because the length of the shadow does not match up right.
Third: 21-18=3
Fourth: 3 is 1/3 of 9, so then we divide 4ft. by 3.
Fifth: i can't do that, so i take the ft. number into inches which is 48.
Sixth: i divide 48 by 3
Seventh: you get 16.
Eighth: 16 inches = 1ft. 4 inches.
( oops just realized i messed up in the answer)
Ninth: add the previously known 8 ft. to 1 ft. 4 inches and you get the height of the tree: 9ft. 4 in.
Hope that helps :P

Answer 4

It confuse me