Question

In a race for 100 m dash, the first and the second runners have a gap of half metre at the mid-way stage. Assuming first runner goes steady, by what percentage should the second runner increases his speed just to win the race.​

Answer 1

Explanation:

midway lets suppose time passed as t then first runner’s speed was 50/t and second runner’s was 49/t. now as first runner goes steady he will cover the distance to finish from midway in time interval of t. to win the second runner must cover his remaining 51 m in that interval. so if his speed becomes 51/t he will reach there at the same moment with first runner and percentage increase in speed would be

(((51/t)-(49/t))/(49/t))*100

which is equal to 200/49%

so he must increase his speed by >(200/49)%

Answer 2

Answer:

Q)In a race for 100 m dash, the first and the second runners have a gap of half metre at the mid-way stage. Assuming first runner goes steady, by what percentage should the second runner increases his speed just to win the race.

Solution - In attachment you can refer

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