Verified Answer :
1 kilometers =1000 meters
0.86km=0.861000=860m
John swam 860 meters each day.
1 week = 7 days
3weeks=37=21
21*860=18060 m
Therefore he swam 18060 meters in those three weeks.
John swam 18060 meters for those 3 weeks.
Further explanation
Some units of length and its conversion that need to be recalled are:
\(1 ~ foot = 30.48 ~ cm\)
\(1 ~ inch = 2.54 ~ cm\)
\(1 ~ foot = 12 ~ inches\)
\(1 ~ mile = 1609.34 ~ metres\)
\(1 ~ yard = 0,9144 ~ metres\)
\(1 ~\mu m = 1 \times 10^{-6} ~ m\)
Let us now tackle the problem !
Given:
John swim 0.86 kilometers each day for three weeks.
\(\texttt{Total Distance} = 0.86 ~ \texttt{km/day} \times 3 ~ \texttt{weeks}\)
\(\texttt{Total Distance} = 0.86 ~ \texttt{km/day} \times (3 \times 7) ~ \texttt{days}\) → 1 week = 7 days
\(\texttt{Total Distance} = 0.86 ~ \texttt{km/day} \times (21) ~ \texttt{days}\)
\(\texttt{Total Distance} = 18.06 ~ \texttt{km}\)
\(\texttt{Total Distance} = 18.06 \times 1000 ~ \texttt{m}\) → 1 km = 1000 m
\(\texttt{Total Distance} = \boxed {18\ 060 ~ \texttt{m}}\)
Conclusion :
John swam 18060 meters for those 3 weeks.
Learn more
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Answer details
Grade: High School
Subject: Mathematics
Chapter: Unit of Length
Keywords: Velocity , Driver , Car , Deceleration , Acceleration , Obstacle , Speed , Time , Rate , Length , Microscope, Ironman , Competition , Week