In a 1400 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.
A) 100 sec.	B) 70 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= 1400/5= 
<gadget id="calculator">1400/5</gadget>
<output>280</output>
280 sec.   Time taken by Baley to complete the race is D= 1400/4= 
<gadget id="calculator">1400/4</gadget>
<output>350</output>
350 sec.   Hence, D-70 sec= 70 sec   ANSWER:70 sec
<result>B</result>
In a 1400 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 ?