Verified Answer :

The volume of the cuboid is the product of the edge
V = abc
V - volume
edge length ( labeled a, b , c )
a = 12in
b = 5in
c = h = 5in

V = 12in 5in 5in = 300in
³

When doing these always yous the formula 
riangular Prism Volume Formula. The volume of a triangular prism can be found by multiplying the base times the height. Both of the pictures of the Triangularprisms below illustrate the same formula. The formula, in general, is the area of the base (the red triangle in the picture on the left) times the height,h.

l= 12in
h = 5in
b = 5in

V = 12in x 5in x 5in = 300in
³