Vipin can do a piece of work in 2 days; Vaibhav can do the same work in 3 days and Chirag can do the same work in 6 days. If they start working together, how many days will they take to complete the work ?

Correct option is B

Given:

Vipin can do a piece of work in 2 days; Vaibhav can do the same work in 3 days and Chirag can do the same work in 6 days.

Formula Used:

Time = Total Work / Efficiency

Solution:

Let total work be = LCM of 2, 3 and 6=  6 units

Efficiency of Vipin is 3 units/day

Efficiency of Vaibhav is 2 units/day

Efficiency of Chirag is 1 unit/day

Together they do the work in = 6/(3+2+1) = 1 day