
S, M, E and F are working in 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 and 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 contribution of E in the project?
 1 : 1
 1 : 2
 1 : 4
 2 : 1
Correct Option : B
M efficiency = 2 [efficiency of S, E and F]
Contribution of M in the project = x days × 6 hrs × 2
Contribution of E in the project = 2x days × 12 hrs × 1
Contribution of M: Contribution of E x × 6 × 2 : 2x × 12 × 1
1: 2
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