Question

an electrician needs to reach a point 1.6m below the top of the pole of height 8m to undertake the repair work if he has to incline the ladder at 60 degree angle tp the horizontal then what should be the last length to enable him to reach the the required position

Answer 1

Answer:

7.39m

Step-by-step explanation:

The ladder needs to reach 8m - 1.6m = 6.4m up the pole.

Calling the ladder length L, we then have a right angled triangle with a 60° angle, a length of 6.4m opposite this angle, and a hypotenuse of length L.  So

sin(60°) = 6.4m / L

=> √3 / 2 = 6.4m / L

=> L = 2 × 6.4m / √3

=> L ≈ 7.39m