wiz-icon
MyQuestionIcon
MyQuestionIcon
8
You visited us 8 times! Enjoying our articles? Unlock Full Access!
Question

A conical vessel of radius 6 cm and height 8 cm is completely filled with water. A sphere is lowered into the water and its size is such that when it touches the sides, it is just immersed. What fraction of water overflows?

Open in App
Solution

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

(8r)2=42+r2

6416r+r2=16+r2

16r=48r=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


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon