Explanation:
15 miles consume 1 gallon
450 miles consume 450÷15 = 30 gallon per a way
For round trip, it will consume 30*2=60 galloon
1 gallon costs 50 cents
30 galloon costs 30*50=1500 cents per a way
For round trip, 1500*2=3000 cents
9.5m questions
12.2m answers