Question

please answer these questions. It will be helpful for me

d49d958cb19d1f9466e5b058657556cc.pdf

Answer 1

The ladder forms a right angled triangle with the wall and the base with length of the ladder being the length of hypotenuse of this triangle.

Hypotenuse =25 m

Base =7 m

Height =25  

2

−7  

2

=24 m  

Now the ladder slides. In the new position, the hypotenuse of the new right angled triangle will be the same.  

The top slides down by a distance 4m. Hence, the height is 24−4=20 m. Let the base slide by a distance x. Therefore, hypotenuse =25 m

Base =(7+x) m

Height =20 m

By Pythagoras Theorem, we get

25  

2

−20  

2

=(7+x)  

2

 

∴(7+x)=15

Hence, x=8

The correct answer is Option B.