Which of the following best represents the average speed of a fast runner?

Two small planes start from the same point and fly in opposite directions.In three hours, they are 72 kilometres apart. One cyclist rides twice as fast as the other. Two cyclists start from the same point and ride in opposite directions.If the rate of one is 6 km/h more than the rate of the other and they are 168 kilometres apart at the end of 4 hours, what is the rate of each? Two trains start at the same time from the same place and travel in opposite directions.In how many hours will they be 300 kilometres apart? Two men are travelling in opposite directions at the rate of 20 and 30 km/h at the same time and from the same place.How long after the second runner started will they overtake the first runner? One hour later, a second runner began the same course at an average speed of 8 km/h. A long distance runner started on a course, running at an average speed of 6 km/h.How many hours after the cabin cruiser leaves will it be alongside the motorboat? Two hours later, a cabin cruiser leaves the same harbour and travels at an average speed of 16 km/h toward the same island.

A motorboat leaves a harbour and travels at an average speed of 8 km/h toward a small island.When will the second man overtake the first? After travelling for 6 hours, another man starts at the same place as the first man did, following at the rate of 8 km/h. How many hours will it take for Sue to catch up to Sam? Sam starts travelling at 4 km/h from a campsite 2 hours ahead of Sue, who travels 6 km/h in the same direction.Find the distance between the two airports if the total flying time was 7 hours. The average speed to the airport was 90 km/h, and the average speed returning was 120 km/h. As part of his flight training, a student pilot was required to fly to an airport and then return.Find the distance to the resort if the total driving time was 8 hours. A family drove to a resort at an average speed of 30 km/h and later returned over the same road at an average speed of 50 km/h.How far was the island from the harbour if the trip took a total of 5 hours? The average speed on the return trip was 10 km/h. A motorboat leaves a harbour and travels at an average speed of 15 km/h toward an island.

A boy rides away from home in an automobile at the rate of 28 km/h and walks back at the rate of 4 km/h.

How far can he walk into the country and ride back on a trolley that travels at the rate of 20 km/h, if he must be back home 3 hours from the time he started?

A man having ten hours at his disposal made an excursion by bike, riding out at the rate of 10 km/h and returning on foot at the rate of 3 km/h.

After how many hours were they 180 kilometres apart? Their rates were 25 and 35 km/h, respectively.

Two automobiles started travelling in opposite directions at the same time from the same point.

If the rate of the passenger train exceeds the rate of the freight train by 15 km/h, and they meet after 4 hours, what must the rate of each be?

A passenger and a freight train start toward each other at the same time from two points 300 kilometres apart.

If Jerry rides at the rate of 20 km/h, at what rate must Susan ride if they are 150 kilometres apart in 5 hours?

Two bike messengers, Jerry and Susan, ride in opposite directions.

If they start at the same time, how soon will they be 195 kilometres apart? They travel at the rates of 25 and 40 km/h, respectively.

Two trains starting at the same station head in opposite directions.

If they meet after 6 h, find the rate of each. They travel at rates differing by 5 km/h.

Two automobiles are 276 kilometres apart and start to travel toward each other at the same time.

How long will it be before the automobiles meet? An automobile at A starts for B at the rate of 20 km/h at the same time that an automobile at B starts for A at the rate of 25 km/h. QuestionsДЇor Questions 1 to 8, find the equations needed to solve the problems. These distance, rate and time problems will be revisited later on in this textbook where quadratic solutions are required to solve them. They generally involve solving a problem that uses the combined distance travelled to equal some distance or a problem in which the distances travelled by both parties is the same. This means that the time spent travelling at 40 km/h was 0.5 h.Дistance, time and rate problems have a few variations that mix the unknowns between distance, rate and time. For how long did the car travel 40 km/h? Who or What On a 130-kilometre trip, a car travelled at an average speed of 55 km/h and then reduced its speed to 40 km/h for the remainder of the trip.

Which of the following best represents the average speed of a fast runner?