Question

A cylinder is closed at both the ends by hemisphere
The radius of the cylinder is 4.2 cm and
the total height of the solid is 15 cm. Find the
volume of this solid.
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Answer 1

hey mate

here is the answer ..

Answer:

the height of the cylinder=15 cm-2*4.2 cm

=15 cm - 8.4 cm

=6.6 cm

volume of the solid=volume of the cylinder+volume of two hemispheres

volume of the solid=volume of the cylinder+volume of one sphere

volume of the solid=πr²h+4/3πr³

volume of the solid=πr²(h+4/3r)

volume of the solid=π(4.2)²(6.6+4/3*4.2)

volume of the solid=π*17.64(6.6+5.6)

volume of the solid=π*17.64*12.2

volume of the solid=22/7*17.64*12.2

volume of the solid=22*2.52*12.2

volume of the solid=676.368 cm³