A caer travelled the first third of a distance (x) at a speed of `10 km//h`, the second third at a speed of ` 20 km//h` and the last third at a speed of ` 60 km//h`. Determine the average speed of the car over the entire distance (x).

A motor vehicle travelled the first third of a distance s at a speed of v_1 =10 kmph, the second third at a speed of v_2 =20 kmph and the last third at a speed of v_3 =60 kmph. Determine the mean speed of the vehicle over the entire distance s.

A motor vehicle travelled the first third of a distance s at a speed of v_1 =10 kmph, the second third at a speed of v_2 =20 kmph and the last third at a speed of v_3 =60 kmph. Determine the mean speed of the vehicle over the entire distance s.

A motor vehicle travelled the first third of a distance s at a speed of v_(1)=10 kmph, the second third at a speed of v_(2) =20 kmph and the last third at a speed of v_(3)=60 kmph determine the mean speed of the vehicle over the entire distances.