Answer:
Step-by-step explanation:
first convert feet to inches because the measure of cubes is in inches
( 12 inches=1 foot)
9 ft = 12*9=108 inches
8 ft=12*8=96 inches
7 ft= 12*7=84
the volume of the one cube= 5*5*5=125
volume of the classroom: 108*96*84=870912
divide : 870912/125=6967 cubes
