The figure shows four paths along which four different objects move from a starting point to a final point, all in the same time. The grid lines are equally spaced. Rank the paths according to the average speed, the greatest first.
4,2,1,3
Path 4 will have largest average speed as maximum distance is covered in the same time. Next will be 1 and 2 which have equal average speeds and last one will be 3 (minimum distance in equal interval).