Answer:
39.2 km/hr.
Step-by-step explanation:
Given,
Mariko distance to work = 72 mile
1 mile = 1.6 Km
72 mile = 1.6 x 72= 115.2 km
time taken to cover this distance = 2.25 hr
Average speed of mariko = 115.2/2.25 = 51.2 km/hr
Issei distance to work= 226 Km
time taken by issei = 2.5 hr
Average speed of issei = 226/2.5 = 90.4 Km/hr
Difference between their average speed
= 90.4 - 51.2 = 39.2 km/hr
Hence, the average speed difference is equal to 39.2 km/hr.
