Two athletes are training for a marathon on an 11-mile …

Mathematics Questions

Two athletes are training for a marathon on an 11-mile course, running in opposite directions. One runs 2 miles per hour faster than the other, and they meet 1 hour and 6 minutes after starting, with the faster athlete already on the return. How fast is each athlete running, and how far from the starting point do they meet?

Short Answer

The process to understand the runners’ speeds involves three steps: defining the slower runner’s speed as x and the faster runner’s speed as x + 2, setting up an equation based on the time taken to meet (1.1 hours), and solving this equation to find the slower runner’s speed as approximately 2.44 mph and the distance they meet at as about 4.884 miles from the starting point.

Step-by-Step Solution

The answer consists of three detailed steps to understand the runners’ speeds and the meeting distance.

Step 1: Understanding the Speeds

Let the speed of the slower runner be denoted as x miles per hour. The faster runner’s speed will then be (x + 2) miles per hour since they run 2 miles per hour faster. This sets the stage for calculating their respective distances covered over a specific time period.

Step 2: Setting Up the Equation

The time duration taken for the runners to meet is 1 hour and 6 minutes, which equals 1.1 hours. In this time, the distance the slower runner covers is x, while the faster runner covers (x + 2) * 1.1. The relationship between their distances can be expressed as:

  • 2x = (x + 2) * (1.1)

This equation is crucial to determine the value of x.

Step 3: Solving the Equation and Finding Distances

Now, simplify the equation to isolate x:

  • 2x = 1.1x + 2.2
  • 0.9x = 2.2
  • x ‚Äöaa 2.44 miles per hour (slower runner)
  • Speed of faster runner ‚Äöaa 4.44 mph

Finally, plug x back into the original equation to find the meeting distance: the runners meet approximately 4.884 miles from the starting point.

Related Concepts

Speed

The rate at which an object covers distance, typically measured in miles per hour (mph).

Time

The duration over which motion occurs, often expressed in hours and minutes in this context.

Equation

A mathematical statement that shows the equality of two expressions, used here to establish the relationship between the distances covered by the two runners.

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