Traditional Culture Encyclopedia - Travel guide - Xiaoming's family traveled by car. When passing a traffic sign, Xiao Ming noticed the sign on the sign as shown in the figure. If Xiaoming's father drives this distance,
Xiaoming's family traveled by car. When passing a traffic sign, Xiao Ming noticed the sign on the sign as shown in the figure. If Xiaoming's father drives this distance,
Question 1: known time = 120 minutes =2 hours = 90 kilometers.
Speed = distance/time
=90 km /2 hours
= 45 kilometers per hour A: The speed is 45 kilometers per hour.
Solution 2: Known speed = 60km/h distance = 90km.
Time = distance/speed
=90 km /60 km/h
= 1.5 hours
90 minutes A: 90 minutes at the earliest.
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