Question

Lalit and bipin can do work 3 days and 7 days.Uf they work alternate days then find minimum no.Days will work get completed

Answer 1

29/7 day should be ans

Answer 2

Answer:

4 (1/7) or 29/7

Step-by-step explanation:

1. The main formula  being used is Work=Rate x Time
2. Using formula in step 1, Rate of Lalit=1/3 and Rate of Bipin=1/7
3. Now think about it. Assume 1st day lalit works so you get 1/3 rate then next day Bipin works so you get 1/7 and so on.
4. In 2 days, (1/3 + 1/7)=(10/21) of the work is done. Multiply this whole thing by 2 so we get closer to the total work i.e in 4 days, 20/21 of the work is finished.
5. Now, using assumption in step 3, Lalit will be working on 5th day so rate is 1/3. On the 5th day, remnant work is 1/21. Plug these 2 values in equation in step 1 to get remnant time as 1/7.
6. Now, add up the times in step 4 (4 days) and step 5 (1/7).

This gives us our final answer: 4 (1/7)