Question

You place a ladder up against a building. The bottom of the ladder is 6.5 feet from the base of the building. The ladder reaches 20 feet up onto the building. To the nearest foot, how long is the ladder?

Answer 1

21 feet

Explanation:

pythagoreom theorem

a^2+b^2=c^2

6.5^2+20^2=c^2

42.25+400=c^2

442.25=c^2

21 feet