Question

A can do a work in 15 days and B in 20 days. If they work on it together for 6 days, then what fraction of work is left?

A) 1/4 B) 2/9 C) 1/5 D) 3/10

Answer 1

Answer:

1/4 work will be left

Answer 2

Answer:

1/5

Step-by-step explanation:

because

A can do the work in = 15 days

B can do the work in = 20 days

there fore A and B can do the work in = 15 + 20 days

so 15 + 20 = 35

so in 6 days they will do 35 /6 = 1/5