1998 AHSME Problem 21

Algebra Level 3

In an h-meter race, Sunny is exactly d meters ahead of Windy when Sunny finishes the race. The next time they race, Sunny sportingly starts d meters behind Windy, who is at the starting line. Both runners run at the same constant speed as they did in the first race. How many meters ahead is Sunny when Sunny finishes the second race?

d h \frac{d}{h} d 2 h \frac{d^2}{h} d 2 h d \frac{d^2}{h-d} 0

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