Question

Say answer please please please

Answer 1

First find the time
in first case speed =40
Distance =30
Time = Distance /speed
=30/40=0.75
in second case speed =20
distance =30
Time period = 30/20=1.5
total distance =30+30=60
elapsed time = 0.75+1.5=2.25
Average speed =total distance /elapsed time
=60/2.25=26.67km/hr