Question: Solid between planes in Maple?

Good day, I have an assignment in which I'm required to plot the solid that results from the cone (x^2+y^2-z^2=0), limited by the planes z=0 and x+2z=3. So far I've been trying to use plot3d and implicitplot3d, to no avail: the parametric expression from plot3d returns something quite different from the intented, and implicitplot3d won't allow the use of variable parameters.

Any ideas on how to solve this?

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