Traditional Culture Encyclopedia - Photography and portraiture - A primary school math problem, too roundabout.
A primary school math problem, too roundabout.
9: 00 to 10: 0 1 min * * *: 70 minutes.
Beckham is gone: 70 minutes × 1.5 speed× 60 seconds = 6300m.
The speed ratio of Xiao and Da Bao is = 1: 4.
Dabao cycling time: 70-30=40
Beckham's 40-minute journey: 40× 1.5×60=3600.
Dabao's walking distance in 40 minutes is four times that of Beckham: 3600×4= 14400 meters.
Dabao total distance+Beckham total distance = double distance =14400+3600 =18000.
Double distance = 18000÷2=9000
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