A prism has these sides: length 5cm, width 4cm and height 3cm what is the volume?

5 cm x 4 cm x 3 cm = 60 cubic cm

Use the formula: l x h x w so: 30 x 4 x 3 = 360 also, we never use the slant height.. just there to throw you off!!!!

(5 cm)(4 cm)(3 cm)
= (20 cm²)(3 cm)
= 60 cm³

Assuming a rectangular prism:-
V = 5 x 4 x 3 cm³
V = 60 cm³

If its 3 sided then it'd bea triangular prism wouldn't it? 30 cubic cm

60 cubic cm, i really hope that you're not older than 12 years old because if you're not....
Than you must be a very stupid Person, i figure out the answer in 3 seconds.

length x width x hight = z

5x4=20 x 3=60

5x4x3

60cm cubed.
V=AH
= L x W x H
= 5 x 4 x 3
= 20 x 3
= 60cm3

I hope it was a rectangle, because if it wasn't there is a completely different rule.

V=Bh
=(5cm)(4cm)(3cm)
=60 cubic centimeter