The $ \frac{3}{4} $ th part of a conical vessel of internal radius $ 5 \mathrm{~cm} $ and height $ 24 \mathrm{~cm} $ is full of water. The water is emptied into a cylindrical vessel with internal radius $ 10 \mathrm{~cm} $. Find the height of water in cylindrical vessel.
Given:
The \( \frac{3}{4} \) th part of a conical vessel of internal radius \( 5 \mathrm{~cm} \) and height \( 24 \mathrm{~cm} \) is full of water. The water is emptied into a cylindrical vessel with internal radius \( 10 \mathrm{~cm} \).
To do:
We have to find the height of water in cylindrical vessel.
Solution:
Volume of cone$=\frac{1}{3}\pi r^2h$
$=\frac{1}{3}\times3.14\times 5\times5\times24$
$=628\ cm^3$
Water filled$=\frac{3}{4}\times 628=3\times 157$
$=471\ cm^3$
This volume of water is filled in the cylinder.
Volume of cylinder$=\pi r^2h$
$\Rightarrow 471=3.14\times 10\times 10\times h$
$\Rightarrow h=\frac{471}{314}$
$\Rightarrow h=1.5\ cm$
Therefore, the height of the water level in the cylindrical vessel is $1.5\ cm$.
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