Question

a car travels at 60 km/h from mumbai to poona and at 120 km/h from poona to mumbai. what is the average speed of the car for the entire journey.

Answer 1

Hii..
Here is your answer..

Solution:-
Let the distance travelled from Mumbai to Poona be x.
So,
Time taken =Distance/Speed
$= > \frac{x}{60}$
Let the distance travelled from Poona to Mumbai be x.
So,
Time taken =
$= > \frac{x}{120}$
Now,
Total Distance travelled= x +x
=>2x
Total time taken =
$= > \frac{x}{60} + \frac{x}{120} \\ = > \frac{2x + x}{120} \\ = > \frac{3x}{120}$
We know that,
$average \: speed = \frac{total \: distance}{total \: time \: taken}$
$= > \frac{2x}{ \frac{3x}{120} }$
$= > \frac{2x \times 120}{3x} \\ = > \frac{240x}{3x} \\ = > 80$
Hence,
Average speed=80km/h

Hope it helps uh...✌️✌️✌️

Answer 2

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