MAth
posted by Caroline .
a concrete area measures 20ft on each side. the concrete slab will be 8 inches deep. how many cubic feet of concrete will be needed?
my set up is 20 x 20 + 32 ????

cubic feet= LWH=20*20*8/12=?

By the way, did you figure out that age problem?
if x = 10
then 6+3x = 36