Did you read your question before posting it? Apart from the fact that few cars can travel at 350 miles per hour, the question asks how much time ...[for] ... 3 hours. The answer, obviously, is 3 hours!
385
40 x 2.5 = 100 miles.
120/3 = 40 miles per hour. So it will take 1 hour to go 40 miles.
15 hours and 2 minutes.
150: 50 = 3 h. It will take 3 hours to travel the 150 miles.
238 miles in 3 hours and 30 minutes = 68 mph
It travels 288 miles in 4 hours 30 minutes at that speed.
The car will travel 297.5 miles.
A submarine that travels 56 miles in 4 hours averages 16 miles per hour. (The 56 miles divided by 4 hours = 16 miles per hour.) To cover 700 miles at 16 miles per hour will take 700 miles divided by 16 miles per hour = 50 hours.
385
55 x 6 = 330 miles.
40 x 2.5 = 100 miles.
It really depends on the speed of the car. If it is traveling at 60 miles per hour, it would travel 120 miles. If it is traveling at 20 miles per hour, it would travel 40 miles.
5 hours and 2 minutes.
120/3 = 40 miles per hour. So it will take 1 hour to go 40 miles.
27 / 3 = 9 Thus the person travels 9 miles in an hour and 70/9 hours to travel 70 miles. You do the math.
15 hours and 2 minutes.