Question

how long should be the ladder which one would need in order to reach a window 12m high given that the foot of ladder can be placed at a maximum distance of 5m away from the wall

Answer 1

Answer: 13m

Step-by-step explanation:

It can be found by using pythagoras theoram

(height of window will be perpendicular and distance between the wall and the ladder is base)

height of the window=12m

distance between the wall and the ladder =5m

pythagoras theoram: H^2=P^2+B^2

                                 = H^2=(12)^2+(5)^2

                                 = 144+25   [We know that the sq. of 12=144 and sq of                                                                                                   5 = 25]

                                 = H^2=169

                                 = H  = sq root of 169

                                 =  H  =13m