Question 47

A certain distance is covered at a certain speed. If half the distance is covered in double thetime, what is the ratio of the two speeds?


Let x km distance be covered in y h.

So, speed in first case = x/y km/hr

And speed in second case = (x/2)/(2*y)   = x/4y km/hr

Required ratio =(x/y)/(x/4y) = (1/1)/(1/4)

= 4 : 1

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