If 80 men can do a piece of work in 10 days, in how many days can 20 m

1.	If 80 men can do a piece of work in 10 days, in how many days can 20 men do the same piece of work ?
Answer» $\sf{\underline{\boxed{\large{\blue{\mathsf{Correct\: Question}}}}}}$ If 80 men can do a piece of work in 10 DAYS, in how many days can 20 men do the same piece of work ? _______________________ $\sf{\underline{\boxed{\large{\blue{\mathsf{Solution}}}}}}$ $\sf{\bold{\green{\underline{\underline{Given}}}}}$ 80 men can do a piece of work in 10 days _______________________ $\sf{\bold{\green{\underline{\underline{To\:Find}}}}}$ 20 men required how many days to do the same work =???? ______________________ $\sf{\bold{\green{\underline{\underline{Solution}}}}}$ USING unitary method $\sf\implies$ 80 men can do the work in = 10 days $\sf\implies$ 1 men can do the work in = $\sf10\times 80$ $\sf\implies$ 20 men can do the work in = $\sf{10\times 80}{20}$ $\sf\implies$ 20 men can do the work in = $\sf{10\times 4}$ $\sf\implies$ 20 men can do the work in = $\sf <klux>40</klux> days$ ________________________ $\sf{\bold{\green{\underline{\underline{Answer}}}}}$ 20 men complete the work in 40 days