Question

amar and suresh can do a piece of work in 12 days , suresh and mohan in 15 days mohan and amar in 20 days .In how many days will they complete it together and seperately​

Answer 1

Answer:

complete work 10 days Amar in 30 days suresh in 20 days mohan in 60 days

Step-by-step explanation:

Let Amar=A,Mohan =B and Suresh=S

amar and suresh can do a piece of work in 12 days

A+S=1/12 days

suresh and mohan in 15 days

S+M=1/15 days

mohan and amar in 20 days

M+A=1/20  days

In how many days will they complete it together

2(A+M+S)=1/12+1/15+1/20

2(A+M+S)=12/60

A+M+S=6/60

A+M+S=1/10 days

M=1/10-(A+S)

  =1/10-1/12

  =6-5/60

  =1/60

S=1/15-M

 =1/15-1/60

 =4-1/60

 =3/60

 =1/20

A=1/12-S

  =1/12-1/20

  =5-3/60

  =2/60

  =1/30