\textbf{157.} A bullet is fired in vacuum with no initial velocity from a height $h$ and travels a distance of 3 meters in the last second of its motion. If the distance it has traveled before that equals the distance it travels in that last second, how many meters is $h$? $\left(g = 10\,\dfrac{\text{m}}{\text{s}^2}\right)$
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(1) $20$ \hfill (2) $25$ \hfill (3) $75$ \hfill (4) $80$
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