A train traveled for 6 hours. It moved at a constant rate of 40 miles per hour for the first 3 hours, then increased its speed to a constant rate of 60 miles per hour for the next 3 hours. What was the train's approximate average speed, in miles per hour, over the first half of the distance traveled?

Correct answer marked below

Correct

You can see the correct answer above. Sign in for free to unlock the complete worked solution.

Get detailed analytics, unlock full explanations, and move up difficulty tiers as you practice.

Explanation

Create a free account to reveal the correct answer, see the step-by-step explanation, and start tracking your GMAT progress.

Comments

Be the first to share your thoughts and help others understand it better.

What this question tests

Your application of distance = rate × time to trains, boats, and commuters, including relative speed.

Mixing units (miles per hour vs. minutes) or averaging speeds — average speed is total distance over total time.