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I'm guessing that the answer they're looking for here is that as the speed increases the wind resistance increases more. This means that if you want to go 10 % faster maybe your fuel consumption will increase with 15%. Staying below the speed where wind resistance really begins to hurt lets you get away with using less fuel, which is better for the environment.
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Driving At 25 MPH it will take you about feet to stop your car?
30 feet
Is 30 mph faster or 30 km per hour faster?
30 mph, as a mile is longer than a kilometer.
How long to travel 15 miles doing 30 mph?
It will take about 30 minutes of total driving time at a constant 30 mph. Add some time for stops or delays.
How many miles can be driven in sixty minutes?
At zero spedd , no miles. at 30 mph = 30 miles At 60 mph 60 miles.
What would your stopping distance be if you are driving 30 miles per hour?
Most cars can stop from 60 mph in about 100 feet or so. If the relationship is linear then a car should stop from 30 mph in about 50 feet.
