Exceeding 3497

The maximum allowed speed in the village is 50km/h. The police measured that the car crossed the 800 m long section in 40 seconds. Was the driver fined for exceeding the speed limit?

Correct answer:

v =  72 km/h

Step-by-step explanation:

$$\begin{gathered} t=40\text{s}\to \text{h}=40:3600\text{h}=0.01111\text{h} \\ s=800\text{m}\to \text{km}=800:1000\text{km}=0.8\text{km} \\ v=s/t=0.8/0.0111=72\text{km/h} \\ v>50km/h \\ v=72=72\text{km/h} \end{gathered}$$

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