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Distance = Speed x Time

1)When it's average speed is 20 km/hr

$x=v_{1}Γt_{1}=20Γt_{1}$

2)When it's average speed is 30 km/hr

$x=v_{2}Γt_{2}=30Γt_{2}$

$V_{average}=totaltimetakentotaldistancetravelledβ$

$V_{average}=v_{1}xβ+v_{2}xβx+xβ=20xβ+30xβ2xβ=24ΒkmΒh_{β1}$

Solve any question of Motion in a Straight Line with:-

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