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Indrajit Kumar

· started a discussion

· 1 Months ago

soln (Question: 292706.0 )

first of all find the central angle...which we get 120 deg....now by using angle=arc by radius....now we will get radius=1, now can find the arc easily

Question:

Chord PQ is the perpendicular bisector of radius OA of a circle with centre O (A is point on the edge of the circle). If the length of Arc PAQ =  2p3    . What is the length of chord PQ?

Options:
A)

2

B)

3r

C)

r3    

D)

23    

Solution:

Ans: (c)


OJASWI KOTHARI

· commented

· 1 Months ago

yah how angle is 120? rest i understood

bhaskar meena

· commented

· 1 Months ago

PQ is perpendicular bisector of OA , so we can use here cosine rule . Angle OMQ is 90 ,sin90/r= sin OQM/r/2 , on solving that equation we get here OQM = 30 degree

Abhishek

· commented

· 1 Months ago

How did you find the central angle? thoda detail me samjhao yaar!
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