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 ?​

Answer 1

$\sf{\underline{\boxed{\large{\blue{\mathsf{Correct\: Question}}}}}}$

• 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 ?

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$\sf{\underline{\boxed{\large{\blue{\mathsf{Solution}}}}}}$

$\sf{\bold{\green{\underline{\underline{Given}}}}}$

• 80 men can do a piece of work in 10 days

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$\sf{\bold{\green{\underline{\underline{To\:Find}}}}}$

• 20 men required how many days to do the same work =????

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$\sf{\bold{\green{\underline{\underline{Solution}}}}}$

• 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 = $\sf 40 days$

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$\sf{\bold{\green{\underline{\underline{Answer}}}}}$

• 20 men complete the work in 40 days

Answer 2

$\huge\bold\red{ question }$

80 men can do a piece of work in 10 days ,in how many days can 20 men do the same peice of work ?

$\huge\bold\green{ ♡solution }$

given ;

80 men can do a piece of work = 10 days

1 men can do a piece of work = 80 × 10

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to find ;

how many days can 20 men do the same work ?

now ;

1 men can do the work = 80 ×10

=800

20 men can do the work= 10 × 8020

20 men can do work in = 4 × 10

20 men can do work in = 40 days

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✿answer✿☘️

40 days