Question

pavan can do a piece of work in $15$ days. talbir can do the same work in $20$ days, and Shyam can do it in $12$ days.if all three work together, in how many days can they finish the job?

Answer 1

Pavan can do the work in $15$ days.

Talbir can do it in $20$ days.

Shyam can do it in $12$ days.

Therefore, their $1$ day's work = $\frac{1}{15}+\frac{1}{20}+\frac{1}{12}=\frac{12}{60}=\frac{1}{5}$

Therefore, together they can finish the job in $5$ days.