A car travels 100km at a speed of 60km/h and returns with a speed of 40km/he . Calculate the average speed for the whole journey
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for forward journey time =100/60=1.6hr
for return journey time = 100/40=2.5hr
avg. speed =total dist/total time
=200/4.1
=48.780 km/hr
for return journey time = 100/40=2.5hr
avg. speed =total dist/total time
=200/4.1
=48.780 km/hr
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