एक कार 15 किमी / घंटा की गति
45 किमी की दूरी
की दूरी तय करती
यह अगले 50 किमी की यात्रा 25
किमी / घंटा की गति से और अंतिम 25 किमी की यात्रा 10 किमी /घंटा की गती से पूरा करती है ।कार की औसत गति क्या है?
Answers
Answered by
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Given :-
- Car covers covers 45 kilometre at speed of 15 kilometre per hour.
- It covers next 50 kilometre at speed of 25 kilometre per hour.
- And covers last 25 kilometre at speed of 10 kilometre per hour .
To find :-
- Average speed of the car.
Solution :-
Firstly let's find total time taken in each case.
1st case :-
→ Distance covered by car = 45 kilometre
→ Speed of car = 15 kilometre per hour
→
To cover 45 kilometres the car took 3 hours .
2nd case :-
→ Distance covered by car = 50 kilometre
→ Speed of car = 25 kilometre per hour
→
To cover 50 kilometre the car took 2 hours.
3rd case :-
→ Distance covered by car = 25 kilometre
→ Speed of car = 10 kilometre per hour
→
To cover 25 kilometre the car took 2.5 hours.
→ Now total distance covered by car = [45+50+25] kilometre
Total distance = 120 kilometres
→ Total time taken = [3+2+2.5]hours
Total time taken = 7.5 hours
So average speed of the car is 16 kilometre per hour.
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