Question

A ladder of 6.5dm long when set against the wall of a house reaches at a height of 2.5dm . how far is the foot of the ladder from the wall
please find this answer

Answer 1

H² = P² + B²

B² = H² - P²

B² = (6.5)² - (2.5)²

B² = 42.25 - 6.25

B² = 36

B = $\sqrt{36}$

B = 6