Question

A building casts a 21 foot shadow along the ground. A person 5 feet 3 inches casts a shadow 7 feet long.

How tall is the building?

Answer 1

~28

Explanation:

5 feet 3 inches is 5.25 feet.

We divide 7/5.25 which equals 1.3333333333333 (repeating)

That means we multiply 21 by 1.333333333333 which would round up to 28 feet. (the exact answer is 27.99999999999999999)