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A person travels halff the total dist. at 30 km/hr and the next half at 20 km/hr. find the average velocity (SOLVE USING FORMULA AND SHOW THE DERIVATION OF FORMULA>)

aritra nandy , 14 Years ago

Grade 10

1 Answers

SAGAR SINGH - IIT DELHI

Last Activity: 14 Years ago

Dear student,

Let x be the total distance.

time taken t1 for 1st part=x/2*30=x/60

t2=x/40

total time taken=x/60+x/40= 2x+3x/120=5x/120

total distance=x

average velocity=x*120/5x=24 km/hr

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