Question

4. A ladder is leaning against a wall. The ladder is 20 feet long. The top of the ladder is sliding down at 3 feet/second. The bottom of the ladder is sliding away from the wall at 4 feet/second. a) How high is the top of the ladder up the wall? b) How far is the bottom of the ladder from the wall? [3 marks]

Answer 1

A. day 20 gooft 1. y dog ct -7 2 = 20 =) xuryn zada + 2y de la da ty out 42 t By de dy o V x = o - tig 3 y = 2 = 4. (-37 + you = 20° =) ayat 1byr = 20%. q2 6400 254 = 2 so -16. 2y=6400 3 80 -12 - x= and, 20 s but Rear Cur length can not be negetive so, We take the modulus value 129=12 The ladder is 16 ft tall up to wall The ladder is 12ft 12ft far from the / sol wall