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If 10 persons can do a job in 20 days. Then 20 persons with the twice efficiency can do the same job in:
- a)10
- b)20
- c)5
- d)15
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
If 10 persons can do a job in 20 days. Then 20 persons with the twice...
Calculation:
To solve this problem, we can use the formula:
\[ \text{Number of persons} \times \text{Number of days} \times \text{Efficiency} = \text{Constant}\]
Given:
- 10 persons can do a job in 20 days
- 20 persons have twice the efficiency
Let's assume the constant to be 1 for easier calculation.
Case 1: 10 persons can do the job in 20 days
\[ 10 \times 20 \times \text{Efficiency} = 1\]
\[ \text{Efficiency} = \frac{1}{200}\]
Case 2: 20 persons with twice the efficiency
\[ 20 \times \text{Number of days} \times 2 \times \text{Efficiency} = 1\]
\[ 20 \times \text{Number of days} \times \frac{1}{100} = 1\]
\[ \text{Number of days} = 5\]
Therefore, 20 persons with twice the efficiency can do the same job in 5 days. So, the correct answer is option 'c) 5'.
To solve this problem, we can use the formula:
\[ \text{Number of persons} \times \text{Number of days} \times \text{Efficiency} = \text{Constant}\]
Given:
- 10 persons can do a job in 20 days
- 20 persons have twice the efficiency
Let's assume the constant to be 1 for easier calculation.
Case 1: 10 persons can do the job in 20 days
\[ 10 \times 20 \times \text{Efficiency} = 1\]
\[ \text{Efficiency} = \frac{1}{200}\]
Case 2: 20 persons with twice the efficiency
\[ 20 \times \text{Number of days} \times 2 \times \text{Efficiency} = 1\]
\[ 20 \times \text{Number of days} \times \frac{1}{100} = 1\]
\[ \text{Number of days} = 5\]
Therefore, 20 persons with twice the efficiency can do the same job in 5 days. So, the correct answer is option 'c) 5'.
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Community Answer
If 10 persons can do a job in 20 days. Then 20 persons with the twice...
Let the number of days b x.
Here efficiency is 2 : 1
Number of days 20 : x
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Question Description
If 10 persons can do a job in 20 days. Then 20 persons with the twice efficiency can do the same job in:a)10b)20c)5d)15Correct answer is option 'C'. Can you explain this answer? for Railways 2025 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about If 10 persons can do a job in 20 days. Then 20 persons with the twice efficiency can do the same job in:a)10b)20c)5d)15Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Railways 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If 10 persons can do a job in 20 days. Then 20 persons with the twice efficiency can do the same job in:a)10b)20c)5d)15Correct answer is option 'C'. Can you explain this answer?.
If 10 persons can do a job in 20 days. Then 20 persons with the twice efficiency can do the same job in:a)10b)20c)5d)15Correct answer is option 'C'. Can you explain this answer? for Railways 2025 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about If 10 persons can do a job in 20 days. Then 20 persons with the twice efficiency can do the same job in:a)10b)20c)5d)15Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Railways 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If 10 persons can do a job in 20 days. Then 20 persons with the twice efficiency can do the same job in:a)10b)20c)5d)15Correct answer is option 'C'. Can you explain this answer?.
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