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Corey shovels the snow in 4 hours. With his twin Casey they finish in 2 hours, so Casey alone would take:
A6 hours
B8 hours
C2 hours
D4 hours
Answer & Solution
Correct answer: D. 4 hours
1. Together they do half the job an hour.
2. Corey does one fourth, so Casey does one fourth.
3. Casey alone takes 4 hours.
_Source: OpenStax Elementary Algebra, Chapter 8, Solve Uniform Motion and Work Applications._
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