A car travels the first one third of a certain distance with the speed of 10 km/hr, the next one third with the speed of 20km/hr and the last one third distance with a speed of 60 k/hr. The average speed of the car for the whole journey is
(a) 18kmhr(b) 24kmhr(c) 30kmhr(d) 36kmhr

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A car travels the first one third of a certain distance with the speed of 10 km/hr, the next one third with the speed of 20km/hr and the last one third distance with a speed of 60 k/hr. The average speed of the car for the whole journey is (a) 18kmhr(b) 24kmhr(c) 30kmhr(d) 36kmhr

A car travels the first one third of a certain distance with the speed of 10 km/hr, the next one third with the speed of 20km/hr and the last one third distance with a speed of 60 k/hr. The average speed of the car for the whole journey is
(a) 18kmhr(b) 24kmhr(c) 30kmhr(d) 36kmhr

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A car travels the first one third of a certain distance with the speed of 10 km/hr, the next one third with the speed of 20km/hr and the last one third distance with a speed of 60 k/hr. The average speed of the car for the whole journey is (a) 18kmhr(b) 24kmhr(c) 30kmhr(d) 36kmhr

A car travels the first one third of a certain distance with the speed of 10 km/hr, the next one third with the speed of 20km/hr and the last one third distance with a speed of 60 k/hr. The average speed of the car for the whole journey is (a) 18kmhr(b) 24kmhr(c) 30kmhr(d) 36kmhr

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A car travels the first one third of a certain distance with the speed of 10 km/hr, the next one third with the speed of 20km/hr and the last one third distance with a speed of 60 k/hr. The average speed of the car for the whole journey is
(a) 18kmhr(b) 24kmhr(c) 30kmhr(d) 36kmhr