Question

Raman and Sahil working together could complete
complete it in 28 days. How long would Arun tak

Answer 1

Step-by-step explanation:

Given :- Raman and Sahil working together could complete a work in 35 days and with the help of Arun they could complete it in 28 days. How long would Arun take to complete the work alone ? D) 280 days. LCM of 35 and 28 = 140 unit = Let total work.

Answer 2

Although part of your question is missing, you might be referring to this full question:

Raman and Sahil working together could complete a work in 35 days and with the help of Arun, they could complete it in 28 days. How long would Arun take to complete the work alone?

Given:

Raman and Sahil take 35days.

With help of Arun, they take 28days.

To find:

number of days Arun alone takes to complete.

Solution:

In 1 day, Raman and Sahil can do $\frac{1}{35}$ part of the work.

With help of Arun, in 1 day, they can do $\frac{1}{28}$ part of the work.

So, in one day Arun alone can do $\frac{5-4}{140}=\frac{1}{140}$ part of the work.

SO, 1 part of the work will be done in $\frac{1}{\frac{1}{140} } =140$ days.

Hence, Arun alone can complete the work in 140 days.