Question

You want to erect a pole of height 10 m with the support of three ropes. Each rope has to make an angle 30º with the pole. What should be the length of the rope?

Answer 1

In the attachment.

AC is lenght of rope.

And AB is length of pole.

∠ACB is 30°.

We know,In right angle triangle.

Sin30° = perpendicular/hypotenuse.

So, AC is 20m for each rope

For all three rope=3*20=60m.

Answer 2

Answer:

Step-by-step explanation:

The HT of the pole is 10m

Let length of rope xm

Each rope has to make 30 degrees with the pole

So

Cos30=10/x so

Square root 3/2=10/x

We get x=11.55