Answer :

In the figure, let AC be the ladder and AB is the wall. BC is the distance of the foot of the ladder from wall AB. Join B and C. We get right-angled triangle ∆ABC. Given that, BC = 2m, ∠ACB = 60°. We use trigonometric ratio tan taking AB as the height and BC as the base.

In ∆ABC,

or,

where cos60° = 1/2.

So, the correct option is (D).

Rate this question :

How useful is this solution?

We strive to provide quality solutions. Please rate us to serve you better.

Related Videos

Heights and Distances-I45 mins

Cube and Cuboid41 mins

History - Concept and Questions57 mins

Resources and Development Revision28 mins

Sphere and Hemisphere16 mins

Corrosion: Types, Pros and Cons41 mins

Right Circular Cone And Frustum43 mins

Right Circular Cylinder45 mins

Revision on Substitution and Elimination Method44 mins

Economics - Concept and Questions59 mins

Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Expertsview all courses

Dedicated counsellor for each student

24X7 Doubt Resolution

Daily Report Card

Detailed Performance Evaluation