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Step-by-step explanation

Question 1: Volume of a cycliner is V=πr2h

the radius of the first cyclinder is 5 and the height is 12

V= (π)(5^2)(12)

=942.4777961

=nearest thousandth = 942.478 km3   (km cubed)

Question 2:Volume of a cycliner is V=πr2h

radius=11

height=7

V=(π)(11^2)(7)

=2660.928978

=nearest thousandth= 2660.929 mi3 (miles cubed)