Physics, asked by vedant1960, 1 year ago

A motorcyclist drives from a to b with unifrom sped 30 km/h and return with b to a with unifrom speed 20 km /h find its average speed

curious251082: You are missing the time or distance value, we will need atleast one of them. Please refer example below for reference:-

curious251082: Example 1: A truck goes from Haryana to Bangalore with an average speed of 60 km/hr. The journey takes 30 hours. It returns from Bangalore to Haryana on the same road with an average speed of 40 km/hr. What was the average speed of the truck during the roundtrip?

curious251082: Answer: You may be tempted to find the average speed by summing up the speed and dividing by 2. That is wrong because the average speed is the total distance divided by the total time. Let us find the distance first from Haryana to Bangalore. This can be done as follows:

Distance = (Speed)×(Time). Thus we can say that Distance = 60×30 = 1800 kilometers. Now we have to find the time taken to travel from Bangalore to Haryana. We can write:

curious251082: Time = Distance / speed = 1800/40 = 45 hours. Thus we can find the average speed as:

Average Speed = (Total distance)/(Total Time) = (1800 + 1800)/(30 + 45) = 3600/75 = 48 km/hr. Hence the correct option here is C) 48 km/hr.

So to find the average speed never use the formula of the averages but try to find the total distance covered and the total time taken.

Answers

Answered by surajsharma7443

Average speed is 25 km/h

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