Middle School

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To practice for an Ironman competition, John swims 0.86 kilometers each day for three weeks. How many meters did he swim in those 3 weeks?

Answer :

1 kilometers =1000 meters
0.86km=0.86*1000=860m
John swam 860 meters each day.
1 week = 7 days
3weeks=3*7=21
21*860=18060 m
Therefore he swam 18060 meters in those three weeks.

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Rewritten by : Barada

John swam 18060 meters for those 3 weeks.

Further explanation

Some units of length and its conversion that need to be recalled are:

[tex]1 ~ foot = 30.48 ~ cm[/tex]

[tex]1 ~ inch = 2.54 ~ cm[/tex]

[tex]1 ~ foot = 12 ~ inches[/tex]

[tex]1 ~ mile = 1609.34 ~ metres[/tex]

[tex]1 ~ yard = 0,9144 ~ metres[/tex]

[tex]1 ~\mu m = 1 \times 10^{-6} ~ m[/tex]

Let us now tackle the problem !

Given:

John swim 0.86 kilometers each day for three weeks.

[tex]\texttt{Total Distance} = 0.86 ~ \texttt{km/day} \times 3 ~ \texttt{weeks}[/tex]

[tex]\texttt{Total Distance} = 0.86 ~ \texttt{km/day} \times (3 \times 7) ~ \texttt{days}[/tex] → 1 week = 7 days

[tex]\texttt{Total Distance} = 0.86 ~ \texttt{km/day} \times (21) ~ \texttt{days}[/tex]

[tex]\texttt{Total Distance} = 18.06 ~ \texttt{km}[/tex]

[tex]\texttt{Total Distance} = 18.06 \times 1000 ~ \texttt{m}[/tex] → 1 km = 1000 m

[tex]\texttt{Total Distance} = \boxed {18\ 060 ~ \texttt{m}}[/tex]

Conclusion :

John swam 18060 meters for those 3 weeks.

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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