solve Q. no. 3 please do it by step
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average speed = total distance / total time taken
30×1/2=15
25×1=25
40×2=80
total distance= 120
1/2+2+1=3.5
120×10/35=240/7kmph
30×1/2=15
25×1=25
40×2=80
total distance= 120
1/2+2+1=3.5
120×10/35=240/7kmph
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