A car goes from town a to b with speed od 30 km/h and return back to the town A with speed of 60 km/h what is the average speed of the car during the complete journy
Answers
Given:-
Speeds= 30km/h and 60 km/h
Total Distance covered= 2d( Car has a Return also)
Total time taken=d/30 + d/60
=>2d+d/60
=>3d/60
=>d/20 hour
______________________________
Formula used:-
Average speed=Total distance/Total time
_____________________________
Solution:-
Average Speed=Total distance/Total time
= 2d/d/20
=20*2
=40 km/h
______________________________
Answer:-
40 km/h
Answer:
Explanation:
Given,
Here, we have
Speed of the car from town A to town B = 30 km/hr.
Speed of the car from town B to town A = 60 km/hr .
To Find,
Average speed of the car in its complete journey.
Formula to be used,
Time = Distance/Speed
Average speed = Total distance covered/Total time taken
Solution,
Let us the car travels a distance x km.
Case 1,
⇒ Time, t₁ = x/30 hr.
Case 2,
⇒Time t₂ = x/60 hr.
Total time taken = t₁ + t₂
⇒ Total time taken = x/30 + x/60
⇒ Total time taken = (2x + x)/60
⇒ Total time taken = 3x/60
⇒ Total time taken = x/20 hrs
Now, total distance covered,
⇒ Total distance covered = x + x = 2x km
Now, Average speed,
Average speed = Total distance covered/Total time taken
⇒ Average speed = 2x/(x/20)
⇒ Average speed = (2x × 20)/x
⇒ Average speed = 40 km/hr.
Hence, the average speed of the car is 40 km/h.