Average speed

If the train travels at an average speed of 60 km/h, it will cover a certain distance in 5 hours and 30 minutes. What is the average speed he travels to cover the same distance in 5 hours?

Final Answer:

v =  66 km/h

Step-by-step explanation:

$$\begin{gathered} v_1=60\text{km/h} \\ {t}_1=5:30=5hr30min=5+\frac{30}{60}=5.5hr=5.5 \\ {t}_2=5:0=5hr0min=5+\frac{0}{60}=5hr=5 \\ {v}_1\cdot t_1=v\cdot t_2 \\ 60\cdot 5.5=v\cdot 5 \\ 5v=330 \\ v=\frac{330}{5}=66 \\ v=66=66\text{km/h} \end{gathered}$$

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