A person covers a distance of 80 km at 20 km/h and another 120 km at 40 km/h. Find his average speed for the whole journey. MCQ with Answer and Explanation
The speed of a boat in still water is 15 km/h and the speed of the current is 3 km/h. How much distance can the boat cover upstream in exactly 3 hours?
A person travels a distance of 24 km at a speed of 6 km/h, another 24 km at 8 km/h and a third 24 km at 12 km/h. Find his average speed for the whole journey.
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