A cylindrical container with diameter of base $56\ cm$ contains sufficient water to submerge a rectangular solid of iron with dimensions $32\ cm \times 22\ cm \times 14\ cm$. Find the rise in the level of the water when the solid is completely submerged.
Given:
A cylindrical container with diameter of base $56\ cm$ contains sufficient water to submerge a rectangular solid of iron with dimensions $32\ cm \times 22\ cm \times 14\ cm$.
To do:
We have to find the rise in the level of the water when the solid is completely submerged.
Solution:
Diameter of the cylindrical container $= 56\ cm$
This implies,
Radius $(r) =\frac{56}{2}$
$=28\ cm$
Dimensions of the rectangular solid are $32\ cm \times 22\ cm \times 14\ cm$
Therefore,
Volume of the solid $= lbh$
$= 32 \times 22 \times 14$
$= 9856\ cm^3$
Volume of water in the container $= 9856\ cm^3$
Let $h$ be the level of water.
This implies,
$\pi r^2h = 9856$
$\frac{22}{7} \times 28 \times 28 \times h=9856$
$h=\frac{9856 \times 7}{22 \times 28 \times 28}$
$h=4 \mathrm{~cm}$
The height of the water level is $4 \mathrm{~cm}$.
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