Math Problem Statement

An object is traveling at a steady speed of 8 2/3 miles per hour. How long will it take the object to travel 5 1/5 miles?

Solution

We are asked to determine how long it will take an object to travel 5 and 15\frac{1}{5} miles at a steady speed of 8 and 23\frac{2}{3} miles per hour.

Step 1: Convert mixed numbers to improper fractions

The speed is 8238 \frac{2}{3} miles per hour, and the distance is 5155 \frac{1}{5} miles.

  • For 8238 \frac{2}{3}, convert it to an improper fraction: 823=8×3+23=24+23=2638 \frac{2}{3} = \frac{8 \times 3 + 2}{3} = \frac{24 + 2}{3} = \frac{26}{3}

  • For 5155 \frac{1}{5}, convert it to an improper fraction: 515=5×5+15=25+15=2655 \frac{1}{5} = \frac{5 \times 5 + 1}{5} = \frac{25 + 1}{5} = \frac{26}{5}

Step 2: Use the formula for time

We can use the formula: Time=DistanceSpeed\text{Time} = \frac{\text{Distance}}{\text{Speed}} Substitute the improper fractions: Time=265263=265×326=35\text{Time} = \frac{\frac{26}{5}}{\frac{26}{3}} = \frac{26}{5} \times \frac{3}{26} = \frac{3}{5}

Step 3: Simplify the result

The time is 35\frac{3}{5} hours.

Final Answer:

The object will take 35\frac{3}{5} hours (or 36 minutes) to travel 5155 \frac{1}{5} miles.

Would you like more details or have any questions? Here are five related questions for further practice:

  1. What is the time taken if the distance is doubled but the speed remains the same?
  2. How would the time change if the speed is halved and the distance remains the same?
  3. Convert 35\frac{3}{5} hours into minutes.
  4. If the object were traveling at 10 miles per hour, how long would it take to travel 5155 \frac{1}{5} miles?
  5. How much distance would the object cover in 1 hour at a speed of 8238 \frac{2}{3} miles per hour?

Tip: When dealing with mixed numbers, always convert them to improper fractions for easier manipulation in equations.

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Math Problem Analysis

Mathematical Concepts

Rate and Time
Fraction Arithmetic
Proportions

Formulas

Time = Distance / Speed

Theorems

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Suitable Grade Level

Grades 6-8