A car covers a distance of 300 km with a speed of 60 kilometre per hour and then covers a distance of 450 km with a speed of 90 kilometre calculate his average speed
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Answer :-
- The average speed of the car is 70km/h.
Step-by-step explanation ::
To Find :-
- The average speed of the car
Solution :
Given that,
- Distance ( d₁ ) covered by car = 300km
- Speed of the car = 60km/h
Therefore, Time ( t₁ ) taken by the car is
➟ Distance ÷ Speed
➟ 300 ÷ 60
➟ 5
The time taken ( t₁ ) is 5 hours.
Then,
- Distance ( d₂ ) covered by car = 450km
- Speed of the car = 90km/h
Therefore, Time ( t₂ ) taken by the car is,
➟ Distance ÷ Speed
➟ 450 ÷ 90
➟ 5
The time taken ( t₂ ) is 5 hours.
According the question,
The average speed of the car is,
As we know that,
Average speed = Total distance ÷ Total time,
➟ ( d₁ + d₂ ) ÷ ( t₁ + t₂ )
➟ ( 300 + 450 ) ÷ ( 5 + 5 )
➟ 750 ÷ ( 5 + 5 )
➟ 750 ÷ 10
➟ 70
The average speed of the car is 70km/h.
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