Joke Collection Website - News headlines - There is a road at the entrance of the community. Along this road, the city library is in the east and a middle school is in the west. Two middle school students came after taking part in voluntary la
There is a road at the entrance of the community. Along this road, the city library is in the east and a middle school is in the west. Two middle school students came after taking part in voluntary la
There is a road at the entrance of the community. Along this road, the city library is in the east and a middle school is in the west. Two middle school students came after taking part in voluntary labor in the community.
Q: How far is it from the community to the library?
Answer: Let the distance be x kilometers.
It is known that the walking speed is 5 km/h and the cycling speed is 4 times that of walking, so the cycling speed is 20 km/h.
According to the two schemes, the time is equal, and the equation can be expressed by time = distance/speed.
(3*2+X)/(5*4)=X/4
Get X=2.
So the community is 2 kilometers away from the library.
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