Tortoise vs Hare: Solve Homework Problem

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Homework Statement

Help me with this particular problem.

A tortoise and a hare are having a 1000-meter race. The tortoise runs the race at a constant speed of 2.30 cm/s. The hare moves at an average speed of 1.50 m/s for 10.0 minutes and then decides to take a nap. After waking up from the nap, the hare recognizes that the tortoise is about to cross the finish line and immediately accelerates from rest with a constant acceleration of 0.500 m/s/s for the remaining distance of the race. If the tortoise wins by a hair (no pun intended), then what is the time in hours that the hare napped?

t for tortoise=50 000s t for hare without nap=620s

Homework Equations

The Attempt at a Solution

I get 13.7hr when the answer is 11.9hr subtracting those amounts.

 

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How did you get that result?

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