# What will be the Hours a Day? If

15 man take 20 days to complete a job working 8 hours a day. The number of hours a day should 20 men take to complete the job in 12 days

- 5 hours
- 10 hours
- 15 hours
- 18 hours

**Answer: (2) 10 hrs.**

**Explanation:-**

**Formula –**

**M _{1} H_{1} D_{1} = M_{2} H_{2} D_{2
}Where, M – Number of men, H – number of hours & D – number of days.**

Here, M

_{1}= 15, H

_{1}= 8, D

_{1}= 20

And M

_{2}= 20, D

_{2}= 12 & H

_{1 }= ?

Put these values in formula,

15 x 8 x 20 = 20 x 12 x H

_{2 }H

_{2}= 2400/240

H

_{2}= 10 hrs.

Hence, the answer is (2) 10 hrs.