Question

If 20 men working 8 hour per day can complete a piece of work in 21 days. How many hours per day must 48men work to complete the same job in 7 days

Answer 1

Answer:

10 hours per day 48 men complete the job in 7 days

Step-by-step explanation:

Answer 2

48men work 10 hours per day to complete the same job in 7 days

Step-by-step explanation:

We are given that 20 men working 8 hour per day can complete a piece of work in 21 days.

Let $M_1$ be the no. of men , $H_1$ be the no. of hours and $D_1$ be the no. of days in case 1 .

$M_1 = 20 \\H_1 = 8 \\D_1 = 21$

We are supposed to find How many hours per day must 48men work to complete the same job in 7 days

Let M_2 be the no. of men , $H_2$ be the no. of hours and $D_2$ be the no. of days in case 2

$M_2=48\\D_2=7 \\H_2 = ?$

ATQ

$20 \times 8 \times 21=48 \times 7 \times ?\\\frac{20 \times 8 \times 21}{48 \times 7}=?\\10=?$

Hence 48men work 10 hours per day to complete the same job in 7 days

#Learn more:

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