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29-09-2018
Mathematics

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tramserran tramserran

29-09-2018

d = |150 - 20t|

70 = |150 = 20t|

70 = 150 - 20t -70 = 150 - 20t

-80 = -20t -220 = -20t

4 = t 11 = t

Answer: 4, 11 seconds

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