Question

A can do a job in 16 days, and B can do the same job in 12 days. With the help of C, they did the job in 4 days. Then, C alone can do the job in (1 Point) *a.12 3/5,B.8 3/5,C.10 3/5,d.9 3/5
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Answer 1

Step-by-step explanation:

let, C can do the job in x days

so C does in 4 days 4/x part of the job

A does in 4 days 4/16 = 1/4 part of the job

B does in 4 days 4/12 = 1/3 part of the job

now,

1/4 + 1/3 + 4/x = 1

or, 3x+ 4x+48/12x = 1

or, 7x + 48 = 12x

0r, 5x = 48

or, x = 48/5

or, x = 9 3/5

ans, 9 3/5