Question

210 men working 12 hours a day can finish a job in 18 days how many men are required to finish the job in 20 days working 14 hours a day ​

Answer 1

Answer:

Step-by-step explanation:210 men can complete a work in 12 hours in 18 days means they worked for (12×18) hours.

so, by inverse variations,

210×12×18

20×14

=162 days

Answer 2

16 men are required to finish the job in 20 days working 14 hours a day ​

Step-by-step explanation:

No. of men required to complete job in 18 days by working 12 hours a day = 20

No. of men required to complete job in 1 days by working 12 hours a day = $20 \times 18$

No. of men required to complete job in 1 days by working 1 hour a day = $20 \times 18 \times 12$

No. of men required to complete job in 20 days by working 1 hour a day = $\frac{20 \times 18 \times 12}{20}$

No. of men required to complete job in 20 days by working 14 hours a day = $\frac{20 \times 18 \times 12}{20 \times 14}$

No. of men required to complete job in 20 days by working 14 hours a day = $\frac{20 \times 18 \times 12}{20 \times 14}=15.42$

So, 16 men are required to finish the job in 20 days working 14 hours a day

#Learn more:

​15 men finish a work in 210 days. But at the end of 100 days 15 additional men are employed then in how many days will work be completed

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