An object covers half the distance with a speed of 20 m/s and other half with a speed of 30 m/s.Find average speed?
Answers
Answered by
1
let the total distance be 2x
case 1
d=x
s=20 m/s
t= d/s=x/20hr
case2
d=x
s=30 m/s
t=d/s=x/30 hrs
total distance=2x
total time=x/20+x/30=5x/60
avg speed=total distance/total time taken=2x/5x/60
solving this we get ...........
avg speed=2*12 =24 km/hr
case 1
d=x
s=20 m/s
t= d/s=x/20hr
case2
d=x
s=30 m/s
t=d/s=x/30 hrs
total distance=2x
total time=x/20+x/30=5x/60
avg speed=total distance/total time taken=2x/5x/60
solving this we get ...........
avg speed=2*12 =24 km/hr
Similar questions