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If 10 men can do a piece of work in 50 days, then how many men are additionally added to do the task in 20 days?
  • a)
    7
  • b)
    15
  • c)
    10
  • d)
    35
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
If 10 men can do a piece of work in 50 days, then how many men are add...
Given:
In the first case:
10 men can do a piece of work in 50 days,
In the second case:
x men are additionally added to do the task in 20 days.
Concept used:
M1 × D1 = M2 × D2
Where, 
M1 and M2 are the numbers of men in the first case and second case respectively.
D1 and D2 are the numbers of days required in the first case and second case respectively.
Calculation:
According to the question,
⇒ 10 × 50 = (10 + x) × 20
⇒ 500 = (10 + x) × 20
⇒ 50 = (10 + x) × 2
⇒ 10 + x = 25
⇒ x = 15
The additional number of persons added to complete the task in 20 days = 15
Therefore, '15' is the required answer.
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Most Upvoted Answer
If 10 men can do a piece of work in 50 days, then how many men are add...
Given:
In the first case:
10 men can do a piece of work in 50 days,
In the second case:
x men are additionally added to do the task in 20 days.
Concept used:
M1 × D1 = M2 × D2
Where, 
M1 and M2 are the numbers of men in the first case and second case respectively.
D1 and D2 are the numbers of days required in the first case and second case respectively.
Calculation:
According to the question,
⇒ 10 × 50 = (10 + x) × 20
⇒ 500 = (10 + x) × 20
⇒ 50 = (10 + x) × 2
⇒ 10 + x = 25
⇒ x = 15
The additional number of persons added to complete the task in 20 days = 15
Therefore, '15' is the required answer.
Free Test
Community Answer
If 10 men can do a piece of work in 50 days, then how many men are add...
Given:
In the first case:
10 men can do a piece of work in 50 days,
In the second case:
x men are additionally added to do the task in 20 days.
Concept used:
M1 × D1 = M2 × D2
Where, 
M1 and M2 are the numbers of men in the first case and second case respectively.
D1 and D2 are the numbers of days required in the first case and second case respectively.
Calculation:
According to the question,
⇒ 10 × 50 = (10 + x) × 20
⇒ 500 = (10 + x) × 20
⇒ 50 = (10 + x) × 2
⇒ 10 + x = 25
⇒ x = 15
The additional number of persons added to complete the task in 20 days = 15
Therefore, '15' is the required answer.
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If 10 men can do a piece of work in 50 days, then how many men are additionally added to do the task in 20 days?a)7b)15c)10d)35Correct answer is option 'B'. Can you explain this answer?
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