In a kilometer race, If A gives B a 40m start, A wins by 19sec. But if A gives B a 30 sec start, B wins by 40 m. Find the time taken by B to run 5,000m?  Pick
A) 2275  B) 2375  C) 2475  D) 2575  E) 2675
Let A travells 1000m in x sec and b in (x+19)sec   Therefore, speed of 2375 is 1000/(x+19)   2375 travel 960m in x sec from here equation of speed=960/x   speed of 2375 is constant so boht the speed equation for 2375 are equal   960/x = 1000/(x+19)   On solving we get x=456sec   Time taken by 2375 for 5000m :  5000/(960/456)= 
<gadget id="calculator"> 5000/(960/456)</gadget>
<output>2_375</output>
2375   ANSWER:2375
<result>B</result>
In a kilometer race, If A gives B a 40m start, A wins by 19sec. But if A gives B a 30 sec start, B wins by 40 m. Find the time taken by B to run 5,000m?