Question

A and B can do a piece of work in 10 days, B and C can do it in 15 days and A and C can do it in 20 days.
How long will they take to do it together and individually?
in 8 hours and Kanta and​

Answer 1

I don't get your question

Answer 2

Step-by-step explanation:

we can write the question as

A+B=10 days........(i)

B+C=15 days........(ii)

A+C=20 days........(iii)

adding (i),(ii) and (iii) we get

A+B+B+C+A+C=10+15+20

2(A+B+C)=45

(A+B+C)=45/2

(A+B+C)=22.5 days

now we can put in the value of A+B to get the time taken by C to complete work

(10+C)=22.5

C=22.5-10

C=12.5 days

A+C=20

A+12.5=20 (we know that)

A=20-12.5

A=7.5 days

A+B=10

7.5+B=10

B=10-7.5

B=2.5 days