Discussion :: Exam Questions Paper
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5 skilled workers can build a wall in 20 days; 8 semi-skilled worker can build a wall in 25days; 10 unskilled workers can build a wall in 30 days, If a team has 2 killed, 6 semi-skilled and 5 unskilled workers, how long will it take to build the wall?
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Answer : Option D
Explanation :
Given, 5 skilled workers can build a wall in 20 days i.e., 1 skilled worker can the wall build in 100 days
∴ The capacity of each skilled worker is 
8 semi-skilled workers can build a wall in 25 days i.e., 1 semi-skilled worker can build a wall in 200 days
∴ The capacity of each semi-skilled worker is 
Similarly, The capacity of 1 unskilled worker is 
Now, The capacity of 2 skilled + 6 semi-skilled + 5 unskilled workers is
∴ The required numbers of days is 15.
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