Question

OPTIONS
A wiring job requires 4 electricians to work for 6 hours to finish the job.
On the day of the job, one electrician does not report. How long would it
take to complete the same job by the remaining electricians?
10 hours
8 hours
18 hours
12 hours​

Answer 1

Answer:

1. Options are available for the job

Answer 2

Find the time taken to complete the same amount of work with the reduced number of men.

Explanation:

• Let the number of men be denoted by 'm', the time taken to complete the work be denoted by 't' and the amount of work be denoted by 'W'
• Then the amount of work is given by, $W=mxt$  
• As the number of men increases or decreases the amount of work does not change.  
• Hence, as the number of men change we get,                                                          
• $W=4(6)=3(t)\\->t=\frac{24}{3} \\->t=8\ hrs$  
• Now the job will $8$ hours to complete.