Posted by Jnr John on .
A 20 foot ladder is leaning against a building.If the ratio of the base of the ladder's distance from the building to its top's height from the ground is 3:4, find how high the top of the ladder is from the ground.

Math>> Help!! 
Henry,
Tan A = Y/X = 4/3 = 1.3333.
A = 53.13o.
h = 20*sin53.13 = 16 Ft.