You wish to cover a rectangular area 6 feet by 20 feet with

You wish to cover a rectangular area 6 feet by 20 feet with mulch. The mulch will be spread uniformly 4 inches deep(1/3 feet deep). If each bag of mulch will cover 2 cubic feet, how many bags are required?

Solution

Volume of mulch to be spread = area* depth = 6*20*(1/3) = 2*20 = 40 cubic feet

Now, eac bag will cover 2 cubic feet of mulch

So, no. of bags = 40/2 = 20 bags of mulch