The cars will be 330 miles apart after three hours (1.00 pm) from 10.00 am (starting time).
<u>Step-by-step explanation:</u>
Data given for first car,
Rate (speed of car 1) = 60 miles/hour
Distance can be calculated by considering ‘X’ for time as,


Similarly, data given for first car
Rate (speed of car 2) = 50 miles/hour

Need to calculate at what time both the cars are 330 miles apart, so the equation would be,
Distance of first car + distance of second car = 330 miles
60 X + 50 X = 330
110 X = 330

Already given that both the cars leave at 10.00 am, so the time would be 10 am + 3 hours = 1.00 pm.
Hence, it takes three hours for the cars to get 330 miles apart.