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Carrie can weed the garden in 7 hours and her mother in 3 hours. Together they take:
A3 hours 6 minutes
B4 hours 6 minutes
C5 hours 6 minutes
D2 hours 6 minutes
Answer & Solution
Correct answer: D. 2 hours 6 minutes
1. Add one seventh and one third.
2. That gives ten twenty-firsts an hour.
3. The job takes 2 hours 6 minutes.
_Source: OpenStax Elementary Algebra, Chapter 8, Solve Uniform Motion and Work Applications._
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