Question

The lower end of a big ladder of length 85m in 13m away from the wall on the ground. At what height , the upper tip will touch the wall?​

Answer 1

Answer:

12

Step-by-step explanation:

Consider the ladder wall system as a right-angled triangle such that length of ladder rested on the wall being the hypotenuse (H), the distance between the foot of the wall and the ladder being the base (B) and length of the wall up to the ladder being the perpendicular (P)

now, given, H = 13 m, B = 5m

Thus, H2=P2+B2 (by Pythagoras theorem)

132=P2+52

P2=144

P=12 m