What is the weight in long tons of 180 barrels of 15 pound per gallon drilling mud?

Correct Answer: Option B — 50.63 long tons

Calculate weight: 180 bbl * 42 gal/bbl = 7,560 gallons. 7,560 gal * 15 lb/gal = 113,400 lbs. Convert to long tons: 113,400 lbs / 2,240 lbs/ton = 50.625 long tons. Rounding to the nearest hundredth provides 50.63 long tons, which is the standard weight for this volume of drilling fluid.