suppose you want to knnow the height of abuldine. A 20 foot tall light post casts a shawdow that is 12 feet long.the showdow cast by the building is 660 feet tall

Question

suppose you want to knnow the height of abuldine. A 20 foot tall light post casts a shawdow that is 12 feet long.the showdow cast by the building is 660 feet tall

Answer 1

h/660 = 20/12 = 5/3

h/220 = 5

h = 1100 feet tall building

UNLESS you meant to say

the building was 660 feet tall and you want to know the shadow length of the building, then

s/660 = 12/20 = 3/5

s/132 = 3

s =132(3) = 396 feet long shadow

just keep the ratio of bulding to shadow the same as for the light post to its shadow

or the ratio of shadow to building the same as the light post to its shadow