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A plane's ground speed with a tailwind of 30 mph, if the plane itself flies at 150 mph, is:
A150 mph
B210 mph
C180 mph
D120 mph
Answer & Solution
Correct answer: C. 180 mph
1. A tailwind adds to the plane's own speed.
2. 150 plus 30 gives the answer.
3. The ground speed is 180 mph.
_Source: OpenStax Elementary Algebra, Chapter 8, Solve Uniform Motion and Work Applications._
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