Physics, asked by tanuverma, 1 year ago

What is the average speed of a person travelling half the distance with the speed of 20 m/s and other half at speed of 30m/s?

Answers

Answered by Anonymous

so let the total distance be 2x
so time taken to cover x distance with 20 m/s is

distance = velocity x time

time = distance / velocity

t₁ = x/20

similarly for the next half time taken t₂ = x/30

t₁ + t₂ = $\frac{x}{20}+ \frac{x}{30}$ = $\frac{x}{12}$

so average speed = 2x/(t₁+t₂)

= $\frac{2x}{ \frac{x}{12} }$ = 24 m/s ANSWER

Anonymous: hope this helps

Anonymous: any question plz ask

Anonymous: plz answer as besyt

tanuverma: Thnx.....but i hv one doubt tht y did u chose 2x as distance as total distance travelled

Anonymous: its due to as if i take 2x it will be easy for me to calculate as if u chose x as the total distance the half will be in fraction ie x/2 which will be a bit problem in calculation if u take x also the answer will be same

tanuverma: Kk..!!

dita: hello, souvik plse answer this question the resultant of two unequal vectors is equal to sum of their magnitudes, the angle between the vector is

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