You pass a road sign saying "New York 125 km." If you drive at a constant speed of 65 mi/h, how long should it take you to reach New York? (Round to the nearest minute.) If your car gets 28 miles to the gallon, how many liters of gasoline are necessary to travel 125 km?
125* (0.622/1)= 77.75
77.75* (1/65)= 1.19615= 1.2 hours
77.75*(1/28)= 2.77679
2.77679*(3.77/1)=10.4685= 10.5 L of gas
This is chemistry??? Looks like math to me.
125 km = 77.7 miles. Check that !
d = r*t
77.7 = 65*t. Solve for t in hours.
28 mi/gallon x ? gallons = 77.7 miles
? gallons = 77.7/28 = 2.8 gallons
2.8 gallons x 3.78 L/gallon = ? L
^^^^ 2.8 gallons x 3.78 L/gallon = 10.584 L
To find out how long it should take you to reach New York, we can use the formula: time = distance / speed. In this case, the distance is 125 km and the speed is 65 mi/h.
First, we need to convert 65 miles per hour to kilometers per hour. 1 mile is approximately equal to 1.609 kilometers, so we can multiply 65 by 1.609 to get the speed in kilometers per hour:
65 mi/h * 1.609 km/mi = 104.2 km/h
Now we can calculate the time it should take to reach New York:
time = distance / speed
time = 125 km / 104.2 km/h ≈ 1.20 hours
Since the question asks for the answer to be rounded to the nearest minute, we can multiply the decimal part of the time by 60 to convert it to minutes:
0.20 hours * 60 min/hour = 12 minutes
So, it should take you approximately 1 hour and 12 minutes to reach New York.
To find out how many liters of gasoline are necessary to travel 125 km, we need to convert miles to kilometers and gallons to liters.
To convert miles to kilometers, we know that 1 mile is approximately equal to 1.609 kilometers. So, we can convert 125 km to miles:
125 km * 0.621 mi/km ≈ 77.68 miles
To convert gallons to liters, we know that 1 gallon is equal to approximately 3.785 liters. So, we can calculate how many gallons of gasoline are needed using the car's fuel efficiency:
77.68 miles / 28 mi/gal ≈ 2.77 gallons
Finally, we can convert gallons to liters:
2.77 gallons * 3.785 L/gallon ≈ 10.49 liters
Therefore, approximately 10.49 liters of gasoline are necessary to travel 125 km.