Posted by Caroline on Friday, April 15, 2011 at 7:00pm.
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 ????

MAth  bobpursley, Friday, April 15, 2011 at 7:05pm
cubic feet= LWH=20*20*8/12=?

MAth  Damon, Friday, April 15, 2011 at 8:10pm
By the way, did you figure out that age problem?
if x = 10
then 6+3x = 36