Question

A can do a piece of work in 20 days while B can do it in 15 days.With the help of C they completed the work in 5 days.In what time would C alone do it.​

Answer 1

Answer:

A alone do work in 20 days.

B alone can do work in 15 days.

A,B,C together can do work in 5 days.

Lets suppose C alone do work in x days.

5

1

​  

=  

25

1

​  

+  

15

1

​  

+  

x

1

​  

 

75

15−3−5

​  

=  

x

1

​  

 

75

7

​  

=  

x

1

​  

,x=  

7

75

​  

 days

C alone do work in  

4

75

​  

 days OR 10.71 days.

Step-by-step explanation: