Question

Aman and Vimal can do a piece of work in 12 days,: Vimal and Chitra in 15 days,
Chitra and Aman in 20 days. In how many days will they finish it together?
(a) 12 days
(b) 10 days (c) 100 days (d) 1 day​

Answer 1

Vimal's 1 day work = 120

Since, Vimal and Kamal can together complete in 12 days

i.e. (Vimal + Kamal)'s 1 day work = 112

Then,

Kamal's 1 day work,

=112−120⇒260⇒130

If Kamal Works only for half a day daily, then his 1 day work becomes 12×130

 = 160

Therefore, 1 day work of both Vimal and Kamal,

=120+160⇒460⇒115

Hence, the work will be completed in 15 days.