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Xiaolin and Xiaomei take a bucket to get water at the same time. It takes 4 minutes for Xiaolin to get full water. It takes 1 minute for Xiaomei to get full water. There is only one faucet. Who gets the water first to make the total time of waiting the least? What is the minimum time?
Xiaomei gets the water first so that the total waiting time is at least one minute
How to calculate time ratio and speed ratio in Mathematics
Example:
From place a to place B, it takes four hours for buses and five hours for trucks. What is the time ratio (4:5) and the speed ratio ()
Why, why, how
The speed ratio is 5:4. Reason: if the bus runs for 4 hours, the speed is 1 / 4; if the truck runs for 5 hours, the speed is 1 / 5, so the speed ratio is 1 / 4:1 / 5, that is, 5:4,
How long will it take?
Amoeba reproduces in a simple way. It takes three minutes to divide each time. One amoeba is placed in a container filled with nutrient solution. After one hour, the container is filled with amoebas. If two amoebas are used instead of one, how long will it take to make the container full?
Amoeba splits from one to two, that is, from the 0 th power of 2 to the 1 th power of 2; when it splits from two to four, that is, from the 1 th power of 2 to the 2 th power of 2. The rule is that after several splits, the total number of Amoeba is the power of 2, and the time taken is several 3 minutes
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