Bunuel wrote:

A runs 25% faster than B and is able to allow B a lead of 7 meters to end a race in dead heat. What is the length of the race?

A. 10 meters

B. 15 meters

C. 25 meters

D. 35 meters

E. 45 meters

If B's usual rate of running the race is 4x, A's rate will be 5x

Since the distances covered by both of them are equal provided A covers

7m less, we can equate the distances. So, \(5x = 4x + 7\) -> \(x = 7\)

Therefore, the total length of the race is \(5x\) =

35 meters(Option D)
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