During the first 14 minutes of a 1.0 hour trip, a car has an average speed 36 km/h. what must the average speed in km/h of the car during the rest of the trip be if the car is to have an average speed of 74.0 km/h for the entire trip

85.5 km/h

Explanation:

= time interval for first phase = 14 min = h = 0.233 h

= time interval for second phase = 46 min = h = 0.767 h

= average speed for the entire trip = 74 km/h

= average speed in first phase = 36 km/h

= average speed in second phase

= distance traveled in first phase

= distance traveled in first phase

average speed is given as

km/h

true, as the earth rotates the sun hits the surface of the planet; causing the day and night cycle.