A 40 pound bag of topsoil covers 12 square feet (one inch deep).

Question

A 40 pound bag of topsoil covers 12 square feet (one inch deep). How many pounds of topsoil are needed to cover 350 square feet (one inch deep)? (Round to the nearest pound.)

Answer 1

40 : 12 :: b : 350     proportion

12b = (40)(350)

 

Can you solve for b?