5.
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?
M is twice as efficient as E but worked for half as many days. So, in this case, they will do equal work if their shifts had same timings. But M’s shift is for 6 hours, while E’s shift for 12 hours. Hence, E will do twice the work as M. Rat io of contribution of M: E in work is 1: 2.