Answer:
hey why u asking same question again and again
123km/h
Explanation:
I really don't know the right way to explain it but the way I did it is just devide 82 by 2 so I can get the speed for 20 mins, then just multiply what I got for 20 mins by 3
82:2=41km/h
41x3=123km/h
4.5m questions
5.9m answers