A 15 foot ladder is resting against a wall. the bottom is initially 10 feet away from the wall and is being pushed towards the wall at a rate of 1/4 ft/sec. how fast is the top of the ladder moving up the wall 12 seconds after we start pusding

Question

anonymous · Answer

x²  +  y²    =    z²
->      y     =    √ (15²  - 10²)   = 5√5 ft

xx'  + yy'   =    0
->        y'   =    - xx' / y
After 12 seconds:
                 =    - 3 ( -.25) / 5√5

anonymous · Answer

u said after 12 seconds = -3(-2.250/ divided by what