related to math

Question

You want to put a 2" thick layer of topsoil for a new 20'x30' garden. The dirt store sells by the cubic yards. How many cubic yards will you need to order?

Answer 1

20x30x1/6 = 100 ft^3

= 100/27 yd^3 = 3 19/27 cubic yards

You have to buy 4 cubic yards if they only sell by the cubic yard