Question

The tops of two poles of height 10m and 18m are connected with wire. If the wire makes an angle of 30° with horizontal, then find the length of wire .

this chapter name is application of trigonometry
plz answer fast

Answer 1

sin 30 = 10/h            first pole

   h= 20 m

sin 30 = 18/h

    h= 36m

 length of wire   20+36

            =56m          ans

Answer 2

Answer:

Let AE be a pole of 10 m and BD  be the another pole of 18 m and DE be the wire.

From the figure,

CD=18−10=8 m

Now,

In △CDE,

sin30∘=DECD

DE=2×8=16 m.

Hence, this is the answer.