Answer:
3.5 hours
Step-by-step explanation:
[tex]speed \: = 60 \\ distance = 210 \\ time = \\ speed \: = \frac{distance}{time} [/tex]
[tex]time = \frac{distance}{speed} \\ time = \frac{210}{60} \\ time = \frac{7}{2} [/tex]
[tex]time = 3.5 \: hours[/tex]
