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UPSC 2014 CDS I Math Paper
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© examsnet.com
Question : 43
Total: 100
A circle of radius 10 cm has an equilateral triangle inscribed in it. The length of the perpendicular drawn from the centre to any side of the triangle is
[2014 CDS-I]
2.5
√
3
cm
5
√
3
cm
10
√
3
cm
None of the above
Validate
Solution:
∠
O
B
D
=
60
°
=
30
°
In right ΔOBD
sin
30
°
=
O
D
O
B
⇒
1
2
=
O
D
10
⇒
O
D
=
5
cm
© examsnet.com
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