Mathematics
NULL
Medium
Question
Two trains 120 miles apart approach at 70 mph and 50 mph. A bird flies back and forth between them at 85 mph until they meet. How far does the bird fly?
A
85 miles
✓ Official correct answer
B
70 miles
C
50 miles
D
120 miles
Community credibility
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A
85 miles
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B
70 miles
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C
50 miles
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D
120 miles
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Explanation
Trains meet after 120/(70+50) = 1 hour. Bird flies for 1 hour at 85 mph ⇒ 85 miles.