Question

A and B can do a work in 40 days and 60 days respectively. They work together. After 6 days B leaves from the work and A continued. After 5 more days C joins with A and both completes the remaining work in 5 days. In how many days C alone can do it.​ plz answer fast. ​

Answer 1

Answer:

30

Explanation:

If A and B can do a work in 40 days and 60 days respectively. They start work together and work for 15 days then C joins them and they finish the work in 20 days. If they get total wage of Rs 720 then, What is the share of C?

A and B together can complete the whole work in

= 40 x 60/(40+60)= 24- days.

The part of the work completed in 15- days= 15/24.

The remaining part of (1–15/24) = 9/24 part of the work is finished in (20- 15)= 5- days, with the assistance of 'C'.

If C- alone can complete the work in X -days, then

5 x (1/24 + 1/X)= 9/24.

So 1/24 + 1/X= 9/120

So 5/120 + 1/X = 9/120.

So 1/X= 9/120 - 5/120 =4/120= 1/30.

So C- alone can finish the complete work in 30- days

Answer 2

ans is 30 mark me as bralnlyest