Radius of the conical vessel, R = AC = 6 cm.
Height of the conical vessel, H = OC = 8 cm.
Let the radius of the sphere be r.
Then, PC = PD = r.
Now, AC = AD = 6 cm.
[Since lengths of two tangents from an external point to a circle are equal]
OA=√OC2+AC2=√82+62=√100=10cm
OD= (OA - AD) = (10 - 6) cm = 4 cm.
OP = (OC - PC) = (8 - r).
In right angled ΔODP, we have:
OP2=OD2+PD2
(8−r)2=42+r2
64−16r+r2=16+r2
16r=48⇒r=3.
Volume of water overflown = Volume of sphere
=43πr3=[43π×(3)3]cm3=(36π)cm3 .
Volume of water in the cone before immersing the sphere = volume of cone
=13πr2h=(13π×(6)2×8)cm3=(96π)cm3
∴ Fraction of water overflown = Volume of water overflownOriginal volume of water
⇒ Fraction of water overflown =36π96π=38