Question 25Ace runs with constant speed and Flash runs $x$ times as fast, $x\gt1.$ Flash gives Ace a head start of $y$ yards, and, at a given signal, they start off in the same direction. Then the number of yards Flash must run to catch Ace is:$xy$$\dfrac{y}{x+y}$$\dfrac{xy}{x-1}$$\dfrac{x+y}{x+1}$$\dfrac{x+y}{x-1}$