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Standard XII

Mathematics

nCr Definitions and Properties

20 workers wo...

Question

$20$ workers working for $5$ hours a day complete a work in $10$ days. If $25$ workers are employed to work $10$ hours a day, what is the time required to complete the work?

4

days

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5

days

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6

days

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8

days

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Solution

The correct option is A $4$ days
We know that,
$M D_{1} H_{1} = M_{2} D_{2} H_{2}$
20 $\times$ 5 $\times$ 10 = 25 $\times$ 10 $\times D_{2}$
$D_{2}$ = 4 days.

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20 workers working for 5 hours a day complete a work in 10 days. If 25 workers are employed to work 10 hours a day, what is the time required to complete the work?

The correct option is A 4 daysWe know that,MD1H1=M2D2H220 × 5× 10 = 25 × 10 ×D2D2 = 4 days.

$20$ workers working for $5$ hours a day complete a work in $10$ days. If $25$ workers are employed to work $10$ hours a day, what is the time required to complete the work?

The correct option is A $4$ days
We know that,
$M D_{1} H_{1} = M_{2} D_{2} H_{2}$
20 $\times$ 5 $\times$ 10 = 25 $\times$ 10 $\times D_{2}$
$D_{2}$ = 4 days.