Car A leaves the airport at 8:00 am and travels at a constant rate of 40 km per hour.
Car A leaves the airport at 8:00 am and travels at a constant rate of 40 km per hour. Car B leaves the airport at 8:45 am and travels in the same direction along the same highway at a constant rate of 52 km per hour. At what time will Car B be 9 km ahead of Car A?
Answer/Solution
12:00 noon
Steps/Work
At 8:45 am, Car A will be 30 km ahead of Car B.
Car B travels at a rate 12 km per hour faster than Car A.
Car B needs to travel 39 km more than Car A in order to be 9 km ahead.
This will take 39 km/12 km per hour=3.25 hours.
Car B will be 9 km ahead at 12:00 noon.
The answer is E.
Car B travels at a rate 12 km per hour faster than Car A.
Car B needs to travel 39 km more than Car A in order to be 9 km ahead.
This will take 39 km/12 km per hour=3.25 hours.
Car B will be 9 km ahead at 12:00 noon.
The answer is E.