Question

A can do a work in 36 days and B in 12 days. If they work on it together for 3 days, then what fraction of work is left?

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

Answer 1

Step-by-step explanation:

One day work of A = 1/36

One Day Work of B = 1/12

One Day work Of Both A and B = 1/36 + 1/12

= 1/36 + 3/36 = 4/36

1/9 ....

so, 3 days work = 3 × 1/9 = 3/9

1/3 work done .

left = 1 - 1/3 = 3/3 - 1/3 = 2/3 is Your Answer...

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