Question

Three workers W1, W2 and W3 got work from the contractor. In 5 days, ‘W1’ completed 25% of work. ‘W2’ is 20% less efficient than ‘W1’ but takes 5 days less than ‘W3’ to complete the work alone. Find the time taken by all three together to complete 74% of work.

A 7
B 6
C 4
D 4.5
E 10
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