A toy fire truck is positioned so that the base of the ladder is 13 cm from the wall adn 9 cm from the surface of the ground. The ladder is extended 28 cm to the wall. How high above the ground is the ladder?

A right triangle with hypotenuse 28 cm and one side 13 cm will have the other side of length √(28² - 13²) = √615 ≈ 24.8 cm.

Because the base of the ladder is 9 cm from the ground, the top of the ladder will be 33.8 cm from the ground.