Respuesta :
Answer:
28 mph
Step-by-step explanation:
1h = 60m
45m --- 21 miles
60m --- [tex]\frac{60}{45}[/tex] Ć 21 miles = 28 miles
Thus, his average speed is 28 mph.
Answer:
28 mph
Step-by-step explanation:
1h = 60m
45m --- 21 miles
60m --- [tex]\frac{60}{45}[/tex] Ć 21 miles = 28 miles
Thus, his average speed is 28 mph.