A backyard swimming pool holds 185 cubic yards (yd3) of water. What is the mass of the water in pounds.

According to the google, a cubic yard of water weighs about 1684.8 pounds.

So multiply 185 and 1684.8 and you end up with 311,688 pounds.

I also did the more scenic route since there are 27 cubic feet per cubic yard and a cubic foot of water weighs about 62.4 pounds.

I multiplied 185 x 27= 4995 x 62.4 and ended up again with 311,688 pounds.