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$S$, $M$, $E$ and $F$ are working in the shifts in a team to finish a project. $M$ works with twice the efficiency of others but for half as many days as $E$ worked. $S$ amd $M$ have $6$ hour shifts in a day, whereas $E$ and $F$ have $12$ hours shifts. What is the ratio of contribution of $M$ to contribute of $E$ in the project?

  1. $1:1$
  2. $1:2$
  3. $1:4$
  4. $2:1$

7 Answers

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Contribution = efficiency × hours/day × days

M’s work = 2 × 6 × (D/2) = 6D
E’s work = 1 × 12 × D = 12D

Ratio (M : E) = 6D : 12D = 1 : 2

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