Question

if A and B together can complete the work in 10 days. A takes twice the time take by B to complete the work,then in how many days B can complete the work?

Answer 1

Answer:

15 days

Step-by-step explanation:

1/a + 1/b =1/10

this much work in one day

1/b + 1/2b =1/10

because if i will double a time will a take will be less so doubling b will make a to take 2x time

3/2b=1/10

3=2b/10

3=b/5

b=15days

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Answer 2

Answer:

15

Step-by-step explanation:

Work done  by both in 1 day = 1/10

2y + y = 1/10

3y = 1/10

1y = 1/10*1/3

       1*1/10*3

       1/30

A = 1/30

B = 2/30 = 1/15

B complete work in 15 days

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