∵ One man alone finishes te work in 100 days.
⇒ 10 men can finish the work in 10 day.
⇒ 15 women can finish work in one days = 1/6 - 1/10 = 1/15 work

Correct Option: D

∵ One man alone finishes te work in 100 days.
⇒ 10 men can finish the work in 10 day.
⇒ 15 women can finish work in one days = 1/6 - 1/10 = 1/15 work
⇒ 15 women finish the whole work in 15 days
∴ 1 women finishes the whole work in = 15 x 15 = 225 days

Skill ratio of A and B = 8 : 5
So, the time taken by A and B 5W and 8W, respectively.
According to the question, 1/8W + 1/5W = 1/26

Correct Option: A

Skill ratio of A and B = 8 : 5
So, the time taken by A and B 5W and 8W, respectively.
According to the question, 1/8W + 1/5W = 1/26
∴ W = (13 x 26)/40
Now, time taken by B is 8W = 8 x 13 x 26/40
= 67³/₅ days.

Time taken to complete the work by X =10 x 4 = 40 = 40 days
Time taken to complete the work by Y = (40 x 100)/40 = 100 days
Time taken to complete the work by Z = 13 x 3 = 39 days

Correct Option: C

Time taken to complete the work by X =10 x 4 = 40 = 40 days
Time taken to complete the work by Y = (40 x 100)/40 = 100 days
Time taken to complete the work by Z = 13 x 3 = 39 days
Hence, Z will complete the work first.

According to the formula,
Required time = √ab
Where a = 25 and b = 49

Correct Option: A

According to the formula,
Required time = √ab
Where a = 25 and b = 49
∴ Require time = √25 x 49 = 5 x 7
= 35 days

1 man = 2 woman = 3 boys
∴ 1 man + 1 woman + 1 boy = (3 + 3/2 + 1) boys = 11/2 boys
Here M₁ = 3 M₂ = 11/2, D₁ = 88 and D₂ = ?
According to the formula
M₁D₁ = M₂D₂
∴ D₂ = M₁D₁/M₂

Correct Option: C

1 man = 2 woman = 3 boys
∴ 1 man + 1 woman + 1 boy = (3 + 3/2 + 1) boys = 11/2 boys
Here M₁ = 3 M₂ = 11/2, D₁ = 88 and D₂ = ?
According to the formula
M₁D₁ = M₂D₂
∴ D₂ = M₁D₁/M₂
∴ Required number of days
= 3 x 2 x 88/11 = 3 x 2 x 8 = 48 days