10-13.

Mathematics
Tutor: None Selected Time limit: 1 Day

Apr 23rd, 2015

10 : - 

BC^2 = OB^2 - OC^2

BC^2 = 25 - 9

BC^2 = 16

BC = 4

Hence

Length of AB = 2(BC) = 2(4) = 8

11 : -

RS = PQ = 7

Because the chords will have same length if their midpoint bisector meet on the center of the circle.

Apr 23rd, 2015

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