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 60degree angle to the horizontal ,then what should be the length of the ladder to enable him to reach the required position???
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Answer:
The ladder should be 7.39 m long.
Step-by-step explanation:
Let`s L be the length of the ladder.
It has to be inclined at 60° angle to the horizontal. Also it has to reach the point 1.6 m below the top.
8 m - 1.6 m = L · sin 60°
6.4 m = L · 0.866
L = 6.4 m : 0.866
L = 7.39 m
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