Question
After 30 minutes into a race, Julian has run 613 of the route while Tommy has covered only 413 of the distance. Julian runs at the same average speed throughout the race and Tommy’s average speed is 91 m/min slower than Julian’s. If Tommy wants to finish the race at the same time as Julian, by how many percent should he increase his average speed by for the remaining part of the race? Round off your answer to the nearest whole number.
4 m

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After 30 minutes into a race, Julian has run 613 of the route while Tommy has covered only 413 of the distance. Julian runs at the same average speed throughout the race and Tommy’s average speed is 91 m/min slower than Julian’s. If Tommy wants to finish the race at the same time as Julian, by how many percent should he increase his average speed by for the remaining part of the race? Round off your answer to the nearest whole number.