Question

a ladder of length 20 metre leans against a wall so that the top of the ladder is 12 m above the ground level how far is the bottom of the ladder from the wall​

Answer 1

Answer:

Since, Hypotenuse=20m

and Height=10m

∴sinθ=

20

10

⇒sinθ=

2

1

But we know that

sin30

o

=

2

1

Hence, we can say that

θ=30

o

Therefore,

Base

=20cos30

o

m

=20(

2

3

)

=10(1.732)

=17.32m

Step-by-step explanation:

hi

Answer 2

here is your answer,

the ladder becomes the hypotenuse = 20m

height of top of ladder from the ground = 12m

by pythagoras theorem

h²=p²+b²

h=20m

p=12m

b=?

20²=12²+b²

400=144+b²

b²=400-144

b=_/256

b=16m

Hence the length of the bottom of the ladder from the wall is 16m.