One car moving on a staright road covers...

One car moving on a staright road covers one-third of the distance with 20 `(km)/(hr)` and the rest with 60 `(km)/(hr)`. The average speed is

`40 km//h`

`80 km//h`

`462/3km//h`

`39 km//h`

Text Solution

Verified by Experts

The correct Answer is:

Average speed`=d/((d//3)/20+(2d//3)/60)=36 km//h`

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