Answer:
average speed ≈ 71 miles per hour
Step-by-step explanation:
using the relationship
S = [tex]\frac{D}{T}[/tex]
S is the average speed, D is distance and T , time in hours
given D = 230 miles and T = 3 [tex]\frac{1}{4}[/tex] hours = 3.25 hours , then
S = [tex]\frac{230}{3.25}[/tex] ≈ 71 m/ hour ( to nearest whole number )