Ask a New Question

Question

A ladder 20 feet long leans against a house. Find the rate at which the top of the ladder is moving
downward if the foot of the ladder is 12 feet away from the house and sliding along the ground away
from the house at the rate of 2 feet per second?
3 years ago

Answers

oobleck
If x is the distance from the wall
and y is the height up the wall, then
when x=12, y=16
x^2 + y^2 = 20^2
x dx/dt + y dy/dt = 0
12*2 + 16 dy/dt = 0
dy/dt = -3/2 ft/s
3 years ago

Related Questions

A 5 feet long ladder leans against a wall and makes an angle of 65 degrees with the ground. find, t... A ladder 20 feet long leans against the side of a house. Find the height from the top of the ladder... A ladder, 17 feet long, leans against a wall at a 49 degree angle to the ground. How far up the wall... A ladder 15 feet long leans against a vertical wall. Supppose that when the bottom of the ladder is... A ladder 13 feet long leans against a vertical frictionless wall with its lower end 5 feet from the... A ladder 29 feet long leans against a wall and the foot of the ladder is sliding away at a constant... A ladder 10 feet long leans against a building the base of the ladder is 6 feet how high is the pain... A ladder 20 feet long leans up against a house. The bottom of the ladder starts to slip away from t... A ladder 20 feet long leans against a building. If the bottom of the ladder slides away from the bui...
Ask a New Question
Archives Contact Us Privacy Policy Terms of Use