If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Algebra (all content)

Course: Algebra (all content) > Unit 13

Lesson 11: Modeling with rational functions
Math
Algebra (all content)
Rational expressions, equations, & functions
Modeling with rational functions
© 2023 Khan AcademyTerms of usePrivacy PolicyCookie Notice

Mixtures and combined rates word problems

Google Classroom
You might need: Calculator

Problem

Deshawn and Tyriq can weed their garden in 30 minutes together. Alone, it takes Tyriq 75 minutes to weed the garden.
How long does it take Deshawn to weed the garden alone?
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi
minutes
Stuck?
Stuck?