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ATQ, 799.99 + 1500.12 ÷ 29.98 × 50.01 = ? × 24.96 800 + 1500 ÷ 30 × 50 ~ ? × 25 800 + 50 × 50 ~ ? × 25 ? ~ (3300 ÷ 25) ? ~ 132
The distance covered by a train in (4y-1) hours are (64y3-1) km. The speed of the train is.