The tops of two poles of heights 18 metres
and 12 meters are connected by a rope. If
the rope makes an angle 30° with the
horizontal, the length of the rope in metres
is
1/12
2) 18
J12
3) 24
4) 30
Answers
Answered by
0
According to the problem given ,
Height of the first pole = AB = 18 m
Height of the second pole = CD = 12 m
Length of the wire = AD
AE = AB - BE
= AB - CD
= 18 - 12
AE = 6 m
In ∆ AED ,
< AED = 90° ,
<ADE = 30° ( given )
Sin 30° = AE/AD
1/2 = 6/AD
AD = 6 × 2
AD = 12 m
Therefore ,
Length of the wire = AD = 12 m
Option ( a ) is correct.
Attachments:
Similar questions