36
2 women and 10 children together take 8 days to complete a piece of work How many days will 10 children alone take to complete the piece of work if 8 women alone can complete the piece of work in 6 days ?
- A15
- B12
- C10
- D24
Answer not set
Discussion 1
Log in or create a free account to reply and vote.
0
CCommunity
Solution
Let the speed of women be x and that of children be y. Let the piece of work be W.
2x + 10y = W/8
8x = W/6
x = W/48
Hence, we get y= W/120
Speed of 1 child = W/120
Speed of 10 children = W/12
Now time needed for them to complete = W/(W/12) =12days
Therefore, the correct option is B.
Let the speed of women be x and that of children be y. Let the piece of work be W.
2x + 10y = W/8
8x = W/6
x = W/48
Hence, we get y= W/120
Speed of 1 child = W/120
Speed of 10 children = W/12
Now time needed for them to complete = W/(W/12) =12days
Therefore, the correct option is B.