A bus departed from the city simultaneously in one direction at a speed of 70 km / h and a passenger car at a higher speed.
| February 9, 2021 | education
A bus departed from the city simultaneously in one direction at a speed of 70 km / h and a passenger car at a higher speed. Three hours later, the passenger car was ahead of the bus by 60 km. How fast was she going?
1. Since we know from the condition of the problem that in 3 hours a passenger car was ahead of the bus by 60 km, therefore we can find out how many km the car was ahead of the bus for each hour of travel.
60/2 = 20 km.
Since we found out that every hour the car was 20 km ahead of the bus, therefore its speed is 20 km per hour more than the speed of the bus.
2. Let’s define what the speed of a car is equal to if the speed of the bus is 70 km per hour.
70 + 20 = 90 km per hour.
Answer: The speed of the car is 90 km per hour.
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