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please help me

the volume of a rectangular prism is = 297 cube inch

the volume of a triangular prism is = 216 cube inch

the volume of a cylinder = 8491 cube mm

the volume of a cylinder = 1146 cube mm

Step-by-step explanation:

attachment 1

the volume of a rectangular prism is = length X breadth X height

= 11 X 9 X 3 cube inch

=297 cube inch

attachment 2

the volume of a triangular prism is = X a X c X h

= X 2 X 12 X 18 cube inch ( here a = 2 , c = 12, h = 18)

= 216 cube inch

attachment 3

the volume of a cylinder = pi X radius^2 X height

= 3.14 X X 16 cube mm ( here pi = 3.14)

= 8490.56 cube mm

=8491 cube mm

attachment 4

diameter = 16 mm

radius = 16/2 mm = 8 mm

so the volume of cylinder = pi X radius^2 X height

= 3.14 X X 5.7 cube mm ( here pi = 3.14)

= 1145.47 cube mm

= 1146 cube mm

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step-by-step explanation: