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21 Feb 2018
7. (10 marks) A ladder initially leans against a vertical wall, with its bottom resting on flat ground. Then the bottom starts to slide away from the wall at a rate of 2 m/min. At the moment that the top of the ladder is 4 m above the ground, it is sliding down the wall at 1.5 m/min. What is the length of the ladder?
7. (10 marks) A ladder initially leans against a vertical wall, with its bottom resting on flat ground. Then the bottom starts to slide away from the wall at a rate of 2 m/min. At the moment that the top of the ladder is 4 m above the ground, it is sliding down the wall at 1.5 m/min. What is the length of the ladder?
teacherrecoLv10
20 Apr 2022
Hubert KochLv2
22 Feb 2018
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ladder is resting against a wall. Initially, the bottom of the ladder is 
away from the wall. It is being pushed up at a rate of 
. At what rate is the top of the ladder moving up the wall at 
seconds after it starts being pushed?
