It will cost $21 to drive from Monroe to Boston.
Step 1. Convert kilometres to miles
Distance = 240 km × (1 mi/1.609 km) = 149.2 mi
Step 2. Calculate the gallons of gas
V = 149.2 mi × (1 gal/27 mi) = 5.52 gal
Step 3. Calculate the cost of the gas
Cost = 5.52 gal × ($3.75/1 gal) = $21
