alleryA boat heads straight at constant speed to a vertical cliff: water-level top elevation 30°→60° takes 10 min. Time left?
A10 min
B20 min
C15 min
D5 min
Answer & Solution
Correct answer: D. 5 min
The remaining distance at 60° is half the distance covered between 30° and 60°, requiring 5 more minutes.
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