A runner hopes to complete the 10,000-{\rm m} run in less than 30.0 {\rm min}. After running at constant speed...

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A runner hopes to complete the 10,000-{\rm m} run in less than 30.0 {\rm min}. After running at constant speed for exactly 27.0 {\rm min}, there are still 1100 {\rm{ m}} to go.The runner must then accelerate at 0.20 {\rm{ m}}/{\rm{s}}^2 for how many seconds in order to achieve the desired time?
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