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Back to 2.4 Solve Mixture and Uniform Motion Applications

2.4 Exercise 20

Avg difficulty 2.5

Christopher and his parents live 115 miles apart. They met at a restaurant between their homes to celebrate his mother’s birthday. Christopher drove one and a half hours while his parents drove one hour to get to the restaurant. Christopher’s average speed was ten miles per hour faster than his parents’ average speed. What were the average speeds of Christopher and of his parents as they drove to the restaurant?

OpenStax Intermediate Algebra 2e, 2.4 Solve Mixture and Uniform Motion Applications, exercise 20

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Adapted from Intermediate Algebra 2e © 2020 Rice University. Licensed under CC BY 4.0. Source: Intermediate Algebra 2e. Imported at revision 77a933c.