Joke Collection Website - News headlines - Highway tunnel sign
Highway tunnel sign
(1) ""is a speed limit sign, which means that the speed should not exceed 80 kilometers per hour; ;
(2) tunnel length s = 2590m = 2.59 km, time t = minutes = 1.30 hours.
So the speed of the car: V = ST = 2.59 km130h = 77.7 km/h "80 km/h", so the car obeys the traffic rules when crossing the tunnel.
So the answer is: km/h; Obey.
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