Note that Speed = Distance/Time.
1st trip:
Distance = 30 mi
Time = 30 min = 0.5 h
Speed = 30/0.5 = 60 mi/h
2nd trip:
Distance = 50 mi
Time = 1 hour
Speed = 50 mi/h
3rd trip:
Distance = 30 mi
Time = 30 min = 0.5 h
Speed = 30/0.5 = 60 mi/h
Average speed = (60 + 50 + 60)/3 = 56.7 mph
The closestanswer is 55 mph
Answer: 55 mph
In our solar system......jupiter
Answer:8.125 kg
Explanation:
Given
deceleration of elevator 
suppose T is the tension in the cord
therefore net force on lamp is


direction of a and g is in the same direction





Body works like a computer whenever there is any problem it warns you and those warnings are termed as symptoms. Of the body doesn't show symptoms we won't be able to detect the problem in our body.