Respuesta :
Answer:
The total amounts of petrol used up by his car is 3.235 gallons.
Step-by-step explanation:
Tony drives his car and drives the first 13 miles in 13 minutes.
So, the average speed was [tex]\frac{13}{13} \times 60 = 60[/tex] mph.
which is less than 65 miles per hour, and the miles traveled per gallon is 50.
So, 50 miles of travel is done by 1 gallon of petrol.
Hence, 13 miles travel is done by [tex]\frac{13}{50} = 0.26[/tex] gallons of petrol.
Now, Tony then drives at an average speed of 68 mph > 65 mph for 1 hour and 24 minutes i.e. 1.75 hours.
Then he travels (68 × 1.75) = 119 miles and the miles traveled per gallon is 40.
So, 40 miles of travel is done by 1 gallon of petrol.
Hence, 119 miles travel is done by [tex]\frac{119}{40} = 2.975[/tex] gallons of petrol.
Therefore, the total amount of petrol used up by his car is (0.26 + 2.975) = 3.235 gallons. (Answer)
