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How many minutes does it take for an ant to crawl two fifths of a meter per minute and eight ninths of a meter?
The time required is: 8 / 9 △ 2 / 5 = 20 / 9 minutes
The ants crawl nine tenths of a meter per minute, with an average of () meters per second
The ants crawl nine tenths of a meter per minute, with an average of (3 / 200) meters per second
An ant crawls 27 / 5 meters in 1 / 4 hour and [] meters per minute. It takes several minutes to complete the 9 / 10 meter long road
1 / 4 hour = 15 minutes
Climbing per minute: 27 / 5 △ 15 = 9 / 25m
9 / 10 △ 9 / 25 = 2.5 minutes
An ant crawls 27 / 5 meters in 1 / 4 hour and [9 / 25] meters per minute. It takes 2.5 minutes to complete the 9 / 10 meter long road
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