Answer:
Evan drive at speed = 81.67 m/hr
Explanation:
Normal speed of Evan = 70 m/hr
Time taken by Evan to visit his grandmother = 35 min = [tex]\frac{35}{60}[/tex] hr
Distance covered by Evan = [tex]{speed}\times{time taken}[/tex] = [tex]70\times\frac{35}{60}[/tex]
= [tex]\frac{245}{6}[/tex] miles
According to the problem, one day Evan was running 5 minutes late. So, the time Evan has to visit his grandmother is 30 mins.
To reach on time, Evan should be drive at the speed :
Speed = [tex]\frac{Distance}{Time}[/tex]
= [tex]\frac{\frac{245}{6} }{\frac{30}{60} }[/tex]
= 81.67 m/hr
