An auto travels at a rate of 25km/hr for 4 minutes, then at 50km/hr for 8 minutes, and finally at 20km/hr for 2 minutes. Find the total distance covered in km and the average speed for the complete trip in m/s.
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25km/hr x 4/60 + 50 x 8/60+ 20 x 2/60=100/60 + 400/60 + 40/60=
540/60=9km in 14 minutes
then 9000m 14x60 sec
X 1sec
X=10.71 meter/sec=avg speed
540/60=9km in 14 minutes
then 9000m 14x60 sec
X 1sec
X=10.71 meter/sec=avg speed
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