How do I find the volume of each figure or shape to the nearest tenth using 3.14 rr? Seventh grade math

I need the figures.

but for cylinder the volume is V=pi*r^2*h

For prism, V = A*h, A is the area of the base of the prism, and h is the height.

Regarding Cylinder and Prims. The Figure of the prism is: 22" by 22" by 42" The cylinder is: 6.5 cm top, by 16 cm. to the nearest tenth, using 3.14for rr

prism V = 22*22*42 = 20328 cubic inches

cylinder: V = 3.14*(6.5)^2 * 16 = 2122.64 cubic cm

James:

The figures are: Cylinder is 6.8 cm top, 16 cm and Prism is 28 m x 10m x 18m volume to the nearest tenth, use: 3.14 for rr

One last question. How did you come up with the answers, can you break it down for me so that I can show my grandson.

prism V = A*h = axbxc

cylinder V = A*h = pi*r^2 *h

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