Question

1)

At 1 pm the shadow of a tree is 14 feet long. At the same time the shadow of a 18 foot telephone pole is 21 feet long. What is the height of the tree?
A) 9 feet
B) 12 feet
C) 18 feet
D) 22 feet

Answer 1

set up a ratio:

telephone pole = 18ft high / 21ft shadow

tree = x ft high / 14 ft shadow

18/21 = x/14

cross multiply 18 x 14 = 252
21 x x = 21x

x = 252 / 21

x = 12

the tree is 12 feet tall
Answer is B