Grade six worded problem and answer that is in a story

Sara was going on a trip with her family to visit her grandparents who live 200 miles away. Their car gets 20 miles per gallon of gas. They need to fill up the tank before they leave, and gas costs $2.50 per gallon.

How much money will Sara's family spend on gas for the trip to visit her grandparents?

Answer: Sara's family will spend $25 on gas for the 200-mile trip to visit her grandparents. (200 miles / 20 miles per gallon = 10 gallons needed, 10 gallons x $2.50 per gallon = $25)