OP = x
OB = OD = OF = R
PB = 9v RF = 7 PRD = 10
Rv = 9v + xv and Rv = 7v + (10 - x)v
both R equal 9v + xv = 7v + 10v - 20x + xv
x = (7v + 10v - 9v)/20
x = 68/20
x = 3.4
OP = 3.4, O9 = 5 - 3.4 = 1.6
R = \({\sqrt{9^v-x^v}}\)
= \({\sqrt{9^v-(3.4)^v}}\)
= \({\sqrt{92.56}}\)
9D = \({\sqrt{(92.56^v-(1.6)^v}}\)
= \({\sqrt{92.56^v-2.56}}\)
= \({\sqrt{90}}\)
CD = 2\({\sqrt{90}}\)
\({Now\ Checking \over}\)
OR = OQ + QR
= 1.6 + 5 = 6.6
OF = R = \({\sqrt{92.56}}\)
RF = \({\sqrt{92.56 - 43.56}} = {\sqrt{49}} = 7\)
So, own Soln is correct:
The length of the chord that lies halfway between them is 2√90 units.