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VTMO 2013 — Grade 6 — semifinal Question 11

VTMO · VTMO 2013 — Grade 6 — semifinal

Question 11

A boat takes $2$ hours downstream $A$→$B$ and $4$ upstream. How long does a drifting raft take $A$→$B$?
  1. $3$
  2. $2$
  3. $4$
  4. $6$
  5. $8$