in a 1200 kilometre journey a man's driving speed was 60 kilometre per hour for the last one fourth of the journey if he completed journey in 17 hours find his driving speed for the first three fourth of the journey
please tell me
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in a 1200 kilometre journey a man's driving speed was 60 kilometre per hour for the last one fourth of the journey if he completed journey in 17 hours find his driving speed for the first three fourth of the journey
please tell me
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