It took 52 seconds for a train to pass the 320 meter long tunnel. When it passed the 864 meter long bridge, its speed was faster than that of the tunnel It took 52 seconds for a train to pass through a 320 meter long tunnel. When it passed the 864 meter long bridge, its speed was 1 / 4 higher than that when it passed through the tunnel. As a result, it took 1:36 seconds. How long is the train? I've been thinking for a long time, whimpering, whimpering, whimpering, whimpering, whimpering, whimpering, whimpering, whimpering, whimpering, whimpering, whimpering, whimpering, whimpering, whimpering, whimpering, whimpering, whimpering For the formula, the equation XY has never been taught. Besides, it's arithmetic control.

1 minute 36 seconds = 96 seconds
Speed of train passing through tunnel = (864-320) / (96 × 5 / 4-52) = 544 ／ 68 = 8 (M / s)
Train length = 8x52-320 = 416-320 = 96 (m)
A: slightly

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