math

a liquid storage container on a truck is in the shape of a cylinder with hemispheres on each end. the cylinder and hemispheres have the same radius. the total length of the container is 140 feet.
I have got the funcion for the volume is y=-2pi/3 x^3+ 140pi x^2

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  1. wouldn't the two hemispheres make up a whole sphere?

    I I would get
    V = (4/3)π x^3 + 140π x^2 , where x is the radius

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