Question

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a particle travels the first half of it's total distance along a straight line with a speed v kmph and the next half ,with the speed of 60 kmph.if the average speed for the journey is 40kmph,the value of v is


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Answer 1

average = summation x/n

therefore = 60+x/2 = 40

60+x = 40*2

x = 80-60

x = 20

therefore v = 20kmph

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=

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Answer 2

Answer:

30 kmph

Explanation:

For explanation,plzz see the above image.