A memorial is in the form of a cube of side 28m in the lower portion. It is surmounted by a cone of largest base and height 3m. Find the volume of air contained in the memorial.
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first volume of cube then volume of cone
add the both
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volume of memorial = volume of cube+volume of cone .
=a^3+1/3×pie×r^2
where, r=d/2=28/2=14
=28^3+1/3×22/7×14×14
=21952+616
=22568
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