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Question


Two poles, of height 7m and 12m are 12 metres apart.
If the top of the two poles are to be connected with a wire, find the length of the wire required.


A
11 m
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B
12 m
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C
13 m
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D
14 m
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Solution

The correct option is C 13 m
According to question,
BC = 12 meters
AB = AE - CD
= 12 - 7 = 5 meters

Using Pythagoras theorem, for ΔABC we get
AB2+BC2=AC2
AC=52+122           =13 m
AC or the third side = 13 meters.
The distance between the poles = 13 meters.

Mathematics

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