Question

a ladder is placed with its foot 5 metre from the bottom of the wall 12 metre high the top of the ladder just reaches the top of the wall find the length of the ladder​

Answer 1

Answer: The length of ladder is 13 m

Step-by-step explanation:

We should use the Pythagoras theorem for this. The length of the ladder will be the hypotenuse of the right angled triangle and let it be AB.

So, in triangle ABC,

AB² = BC²+AC²

AB² = 5²+12²

AB² = 25 + 144

AB = √169 = 13

Answer 2

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