the mass, m, of an object varies directly as the cube of its length, l. m=72 when l=2. Find m when l=5.

M=180 when L=5

Step-by-step explanation:

If m is 72 when mass is 2 then 2.5×2 =5 and so m when 2.5×72=180 :)

each side has a different length.  

step-by-step explanation:

both equations and proportions are better.