Question

3. If a ladder is x feet long, how high up a wall can it safely reach?

Answer 1

Following the 4 to 1 ratio ladder rule

Explanation:

set the base 1 foot out from the wall for every 4 feet it reaches up.

Answer 2

xsin∅

Explanation:

If the ladder is x foot long, and it can safely make a maximum angle ∅ with the floor, then, the maximum height it can reach will be xsin∅