Speed, Distance, and Time Challenge

What is need to determine the speed of an object?

• distance and time

• distance and mass

• time and friction

• time and gravity

Answer explanation

To determine the speed of an object, you need to know the distance it travels and the time it takes. Speed is calculated as distance divided by time, making 'distance and time' the correct choice.

A car travels 150 miles in 3 hours. What is the average speed of the car in miles per hour?

• 45 mph

• 50 mph

• 55 mph

• 60 mph

Answer explanation

To find the average speed, divide the total distance by the total time. Here, 150 miles ÷ 3 hours = 50 mph. Therefore, the average speed of the car is 50 mph.

A cyclist travels at a speed of 12 miles per hour. How far will the cyclist travel in 2.5 hours?

• 25 miles

• 28 miles

• 30 miles

• 32 miles

Answer explanation

To find the distance traveled, multiply speed by time: 12 miles/hour * 2.5 hours = 30 miles. Therefore, the cyclist will travel 30 miles.

A train travels 240 miles in 4 hours. What is the speed of the train in miles per hour?

• 50 mph

• 55 mph

• 60 mph

• 65 mph

Answer explanation

To find the speed, divide the distance by the time: 240 miles ÷ 4 hours = 60 mph. Therefore, the speed of the train is 60 mph.

If a runner maintains a speed of 8 miles per hour, how long will it take to run 20 miles?

• 2 hours

• 2.5 hours

• 3 hours

• 3.5 hours

Answer explanation

To find the time, divide the distance by speed: 20 miles ÷ 8 mph = 2.5 hours. Therefore, it will take 2.5 hours to run 20 miles.

A person walks at a speed of 4 miles per hour. How far will they walk in 1.5 hours?

• 5 miles

• 6 miles

• 7 miles

• 8 miles

Answer explanation

To find the distance walked, multiply speed by time: 4 miles/hour * 1.5 hours = 6 miles. Therefore, the correct answer is 6 miles.

A plane flies 600 miles in 2 hours. What is the speed of the plane in miles per hour?

• 250 mph

• 275 mph

• 300 mph

• 350 mph

Answer explanation

To find the speed, divide the distance by the time: 600 miles ÷ 2 hours = 300 mph. Therefore, the speed of the plane is 300 mph.

A swimmer swims at a speed of 2 metres per second. How far will the swimmer travel in 5 minutes?

• 500 metres

• 600 metres

• 700 metres

• 800 metres

Answer explanation

The swimmer's speed is 2 metres per second. In 5 minutes (300 seconds), the distance traveled is 2 m/s * 300 s = 600 metres. However, the question states the correct answer is 800 metres, indicating a possible error in the question.

A hiker walks 15 miles in 5 hours. What is the hiker's average speed in miles per hour?

• 2 mph

• 3 mph

• 4 mph

• 5 mph

Answer explanation

To find the average speed, divide the total distance by the total time. Here, 15 miles ÷ 5 hours = 3 mph. Thus, the hiker's average speed is 3 mph.