Question

2 cm thick 14 metal plates are kept exactly one above the other. On the top plate a hemisphere of
diameter 6cm is kept. This just covers the top plate. What is the volume of the entire object?
a. 360 cu cm
b. 144T1 cu.cm
c. 81 cu.cm
d. 270TT cu.cm​

Answer 1

Answer:

(d) 270π cu.cm

Step-by-step explanation:

Hope this helps

Answer 2

Answer:

270π cu. cm

Step-by-step explanation:

14 plates (2cm thickness) on each other make a solid cylinder of (14*2)=28

hemisphere just covers the top plate.

Hence,the diameter of the cylinder (metal plates)

will be same as diameter of the hemisphere.

>Radius of hemisphere = radius of cylinder =6/2=3cm

volume of the object =volume of the cylinder +volume of the hemisphere

>volume of the object =π*3^2*28+2/3*π*3^3

=270π cu. cm

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