Question

In a 1000 m race usha beats shiny by 50 m. in the same race, by what time margin shiny beat mercy who runs at 4 m/s ?

Answer 1

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Answer 2

Answer:

Data is not sufficient here.

Step-by-step explanation:

Usha beats Shiny by 50 m means Usha reaches the finish line when Shiny is 50 m away from the finish line i.e. Usha covers 1000m in the time in which Shiny covers 950m.

We can say that the Ratio of their speeds,

Speed of Usha : Speed of Shiny = 1000:950 = 20:19

We don't know their actual speeds.

Usha's speed could be 20 m/s and Shiny's will be 19 m/s.

or  

Usha's speed could be 40 m/s and Shiny's will be 38 m/s.

or

Usha's speed could be 10 m/s and Shiny's will be 9.5 m/s.

etc

We know Mercy's speed is 4 m/s.

We know Mercy takes 1000/4 = 250 s to complete the 1000m

But we don't know Shiny's speed.

We don't know how long Shiny takes to complete the 1000 m hence data is not sufficient here.