Chemistry problem?? HELP!! PLEASE??

Question

A BOX HAS THE TOTAL MASS OF 25 POUNDS IT HAS THE FOL LING DIMENSIONS:

length: 15 inches

width: 12 inches

height: 5 inches

DETERMINE THE DENSITY OF THE BOX IN GRAMS PER CM CUBED

the answer i got was 0.76899176 g/cm cubed [is it correct]??

Answer 1

d= wt/vol

d = 25*454/(15*12*5*2.54^3) = 0.77 to 2 significant digits

Answer 2

volume of the box  = l*w*h = 900 in^3

(900 in^3)(2.54 cm/ 1 in)^3 = 14748.3576 cm^3

(25 lb)(453.59 g/ 1 lb) = 11339.75 g

density = mass / volume = 11339.75 g/ 14748.3576 cm^3 = 0.768 g/ cm^3

Yes, you are correct.