Jake's dad can drive the distance from their house to the water park in 30 minutes. He spends half that journey driving 28 miles per hour and the other half driving 60 miles per hour on the highway. If Jake can bike 11 miles per hour, how many hours will it take him to bike to the water park? Think carefully first, then make a decision:
First find how long half Jake's dad's trip is: 30 minutes / 2 = 15 minutes. Then convert the minutes to hours: 15 minutes * 1 hour / 60 minutes = .25 hours. Now find how far Jake's dad travels at 28 miles per hour: .25 hours * 28 miles per hour = 7 miles. Then find how far Jake's dad travels at 60 miles per hour: .25 hours * 60 miles per hour = 15 miles. Now add those distances to find the total distance to the water park: 7 miles + 15 miles = 22 miles. Now divide the total distance by Jake's speed to find how long it takes him: 22 miles / 11 miles / hour = 2 hours. So, the answer is 2.