An elevator descends 30 floors in 30 minutes. If it then ascends to the top in two thirds of the time it took to descend, how long does the ascent take?
Category: Math · Difficulty: expert
Hint: Calculate two-thirds of the descent time.
Answer
20 minutes
Explanation
If descending takes 30 minutes, then ascending takes 30 * (2/3) = 20 minutes.
This is a expert math riddle — one of the harder riddles here. The answer is 20 minutes.
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