The volume V of a cylinder varies jointly with the height h and the radius squared r2, and V=37.68 cm3 when h=?

The volume V of a cylinder varies jointly with the height h and the radius squared r2, and V=37.68 cm3 when h=3cm and r^2=4cm2. Find V when h=4cm and r^2=36cm2. Round your answer to the nearest hundredth.
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