A painter leans a 20 ft ladder against a house. The base of the ladder is 4 feet from the house. How high does the ladder reach on the house? Type in the answer only and round to the nearest tenth.

Answer 1

Here,

Length of ladder = 20 ft = hypotenuse (H)

Base (B) = 4 feet

So, we have to find out height of ladder (Perpendicular) (P)

as H2=P2+B2

SO, 202=P2 + 42

400= P2 + 16

P2 = 386

P= 19.64