Question

The are 16 workers working to construct a wall and it will take 48 hours to build it. But due to some accident, 4 workers got injured and could not work. Now, the contractor wants the wall to be built in 32 hours. How many more workers are required to complete the job?

• A. 4
• B. 8
• C. 12
• D. 16

Answer 1

The correct option is B

8

Given that 16 workers take 48 hours to build the wall. If the time is reduced to 30 hours, then let the number of workers required be y.

$16\times 48=y\times 32$

$\Rightarrow y=24$

Since 4 workers got injured in an accident and could not work, the remaining number of workers at the site is

$16-4=12$

Thus, the additional number of workers required will be

$24-12=12.$