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Mathematics, 19.11.2020 01:00 mariahbrooks

a line of vehicles of a length 300 meters are moving at an average pace of 60 km/hr. there is a police station on the way and the line is supposed to drop its rate to 40 km per hour at the police station and move with that rate thereafter. what will be the length of the line when it passes the police station? I NEED THE ANSWER IN 10 MINS HURRAY PLS!!

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