Traditional Culture Encyclopedia - Travel guide - (2005? Chongqing) During the May Day holiday, Xiao Ming’s family went on a trip by car. Along the way, the kinesiology knowledge he learned helped him solve many practical problems.
(2005? Chongqing) During the May Day holiday, Xiao Ming’s family went on a trip by car. Along the way, the kinesiology knowledge he learned helped him solve many practical problems.
(1) The speed of the car is V=St=18000m30×60s=10m/s=36km/h;
The fastest way from Aipai to Shangqiao requires tmin=SVmax =18km40km/h=0.45h=27min．
Answer: The speed of the car is 36Km/h, and the fastest time is 27 minutes.
(2) The time it takes to complete the slowest journey t slow = S′V The lowest speed limit = 180km 60km/h = 3h;
The time it takes to complete the fastest journey t fast = S′V Maximum speed limit = 180km 120km/h = 1.5h;
The current time is 10:00 in the morning, so the time Xiao Ming told his father was 11:30~13:00.
Answer: The time Xiao Ming told his father was from 11:30 to 13:00.
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