Karxra
16.10.2020 •
Mathematics
PLEASE HELP
--42 = 7b2 - 385
b=
and b =
Solved
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Ответ:
80 minutes
Step-by-step explanation:
40km is 20% of 60kmph
20% of 60 minutes (1 hour) is 40 minutes.
same thing with 80km and 100kmph
20%