China Naming Network - Naming consultation - Harvesting a piece of wheat, originally planned for 20 people, 12 hours, harvested for 4 hours, the weather suddenly changed, and the rest had to be harvested for two hours. I asked how many people would be added.
Harvesting a piece of wheat, originally planned for 20 people, 12 hours, harvested for 4 hours, the weather suddenly changed, and the rest had to be harvested for two hours. I asked how many people would be added.
Step by step:
It can be seen from the title "12 hours, 4 hours" that 1/3 is collected.
We still need to collect 2/3.
One person charges 1/( 12*20) an hour.
According to "the rest should be collected within two hours", it is known that 1/3 should be collected every hour.
Add (1/3)/(1/(12 * 20)).
One-step completion
Solution: One person is necessary.
20* 12=20*4+(20+a)*2
Available a=60
The answer is 60 people