Concept explainers
To find the time taken by two groups of students to wash
Answer to Problem 9PSP
2.4 hours
Explanation of Solution
Given:
One group of students wash
Calculation:
To evaluate the time taken to wash the cars, calculate the total number of cars washed in one hour.
Work rate of group A in one hour
Work rate of group B in one hour
Let x be the time taken to wash 30 cars.
Work rate to wash 30 cars
Therefore, time taken in car wash is obtained as:
Conclusion:
Hence,
Chapter 5 Solutions
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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