a rectangular prism has a volume of 10 cubic units

270 cubic inches
The formula for calculating the volume of a rectangular prism is given as;
[tex]V=length\times width\times height[/tex]If a rectangular prism has a volume of 10 cubic units, then;
[tex]10=lwh[/tex]If the dimension are each made 3 times long, then the new volume will be:
[tex]\begin{gathered} V_c=3l(3w)(3h) \\ V_c=27lwh......................\text{ 2} \end{gathered}[/tex]
Substitue equation 1 into 2 to have:
[tex]\begin{gathered} V_c=27(10) \\ V_c=270in^3 \end{gathered}[/tex]Therefore the new volume of the prism will be 270 cubic inches