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 ?
Choose the correct choice from the following answers:
A) 100 sec. B) 50 sec C) 25 sec D) Data not sufficient E) None of these
Speed of Shiny = 50/ 10= 
<gadget id="calculator">50/ 10</gadget>
<output>5</output>
5m/s   Time taken by shiny to complete the race is B= 1000/5= 
<gadget id="calculator">1000/5</gadget>
<output>200</output>
200 sec.   Time taken by Baley to complete the race is D= 1000/4= 
<gadget id="calculator">1000/4</gadget>
<output>250</output>
250 sec.   Hence, D-50 sec= 50 sec   ANSWER:50 sec
<result>B</result>
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 ?