quick math
posted by mathlab on .
A patio measures 12 feet by 14 feet. How many 8inchsquare paving stones are needed to pave the patio?
A. 21
B. 252
C. 378
D. 168
my answer is B, but the right answer is C?
can someone explain that to me
thanks

12 x 14 =168 square feet.
If the pavers were 1 foot by 1 foot we would need 168 pavers
BUT.. your paver is 8 inches which is 8/12 or 2/3 of a foot.
It is 2/3 times 2/3 or 4/9 square ft
168 divided by 4/9
which is the same as 168 times 9/4
That will get you to 378.