5. a truck left a diner at 1: 00 p. m. and drove 360 km to jersey city. the truck arrived at 2: 00 p. m. and drove to jersey city at an average 7: 00 p. m. a car left the same dinner speed of 80 km/h. a. how fast did the truck travel?

360 km/h

Explanation:

The truck left the diner at 1.00 pm and arrived at Jersey City at 2.00 pm - This means that the total time of the trip was 1 hour:

The distance covered between the diner and Jersey City was 360 km:

So, the average speed of the truck is given by the distance covered divided by the time taken:

average speed of the truck will be 60 km/h

Explanation:

Truck started his Journey from diner at 1:00 PM

It reached to the Jersey City at 7:00 PM

so here we have total time interval of journey for the truck motion is given as

total distance = 360 km

so here we know that average speed is defined as

so average speed of the truck will be 60 km/h

the answer is b, have negligible mass

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