There are 16 workers working to construct a wall and it will take 48 hours to build it. But due to some accident, 4 workers injured and left. Now, the contractor wants the wall to be built in 32 hours. How many more workers are required to complete the job?

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Solution

The correct option is D
12

Given that 16 workers take 48 hours to build the wall. If the time is reduced to 32 hours, then let the number of workers required be y.
16 × 48 = y × 32
y = 24
Now, since 4 workers got injured and left after accident, the remaining number of workers at the site is 16-4 = 12
Thus, additional number of workers required will be 24 - 12 = 12.

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