Ladder Ladder on the wall!!!

Geometry Level 1

A ladder leaning against the wall makes an angle of 60º with the ground. If the length of the ladder is 19 m, find the distance of the foot of the ladder from the wall.(in metres)

9.25 8.25 8.5 9.5

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9 solutions

In triangle ABC,let the ladder be AB=19m and the distance of the foot of the ladder from the wall be AC=x. Now, cos60=x/19 so,x=9.5. That's our solution....

Mardokay Mosazghi
Aug 13, 2014

The distance of the foot ladder can be given off by 1/2 hypotenus = 19 / 2 = 9.5 19/2 =9.5 meters.This is true by the 30 , 60 , 90 30,60,90 special right trianlge.

Btw this should be in geometry section.

Mardokay Mosazghi - 6 years, 10 months ago

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Sorry, but I cannot do anything now.

Anuj Shikarkhane - 6 years, 10 months ago

19 sin 30 *= 19/2= 9.5Write a solution.

Sam Brown
Aug 16, 2014

Let the distance between the foot of the ladder and the wall be 'd'.

In a right-angled triangle: cosine = adjacent/hypotenuse

Therefore, cos(60) = d/19

d = 19 x 0.5

d = 9.5 metres

Vaibhav Kandwal
Aug 15, 2014

Leaning ladder makes a 90° angle, thus forms a right angled triangle, in which the length of ladder is the hypotenuse (19m), angle is 60° and we have to find base. Using trigonometry, cos 30 = x/19, on solving gives 9.5

Manoj John Manuel
Aug 13, 2014

Consider the Ladder to the wall makes a right angled triangle, then hypotenese = 19m adjacent = ?

cos 60 = adjacent / hypotenese 0.5 = adjacent / 19 therefore, swapping LHS and RHS adjacent = 19 x 0.5 adjacent = 9.5

done....

Vaibhav Borale
Aug 13, 2014

As angle is 60 deg at base-ladder meet point, hypotenuse is double the base always (By 30-60-90 theorem).

And now, hypotenuse is 19......that means base must be its half!!!!!

i.e. 9.5

Half of 19 is 9.5. Edit your solution @VAIBHAV borale

Anuj Shikarkhane - 6 years, 10 months ago

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silly mistake!!!!

VAIBHAV borale - 6 years, 10 months ago
Torbjørn Mevik
Aug 13, 2014

cos(60) x 19 gives the length of the distance between the base of the ladder and the base of the house

Paritosh Joshi
Aug 13, 2014

Let the angle made by ladder with the wall be Δ => Δ= 60° Lenth of ladder=19m

CosΔ=base / hypotenuse

Cos 60°= distance from wall/length of ladder

1/2=d/19

==> d= 9.5m

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