Respuesta :
Answer:
18 hours.
Step-by-step explanation:
First you make the fractions have common denominatiors. 3/8 is equivlant to 18/48. If the road is 18/48 miles long and they can finish 1/48 miles each hour, it will take 18 hours in total.
18 hours because of you multiply 3x6 and 8x6 you get 18/48 so you have 18 hours