Question

Example 2 : An electrician has to repair an electric
fault on a pole of height 5 m. She needs to reach a
point 1.3m below the top of the pole to undertake the
repair work (see Fig. 9.5). What should be the length
of the ladder that she should use which, when inclined
at an angle of 60° to the horizontal, would enable her
to reach the required position? Also, how far from
the foot of the pole should she place the foot of the
ladder? (You may take V3 = 1.73)​

Answer 1

Answer:

2.14m

Step-by-step explanation:

In, the electrician is required to reach the point B on the pole AD. So, BD = AD – AB = (5 – 1.3)m = 3.7 m.                                                                                  Here, BC represents the ladder. We need to find its length, i.e., the hypotenuse of the right triangle BDC.                                                                                                                   sin 60° should be considered.                                                                                           Therefore, she should place the foot of the ladder at a distance of 2.14 m from the pole .

Answer 2

Answer:

2347 storey point 1.3undertajen Kk or W