In this picture: a runner wants reach B by starting at A. Velocity in White space is $10 m/s$ and in brown space is $5 m/s$. what is the minimum time that he need?
$$a)\sqrt{26}$$ $$b)\sqrt{20}$$ $$c)5$$ $$d)\sqrt{30}$$ $$e)\sqrt{34}$$
from Hot Weekly Questions - Mathematics Stack Exchange
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