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  1. If 7 men working 7 hrs a day for each of 7 days produce 7 units of work, then the units of work produced by 5 men working 5 hrs a day for each of 5 days is
    1. 25
      343
    2. 125
      49
    3. 49
      125
    4. 343
      25
Correct Option: B

Using Rule 1,

∴
M1D1T1
=
M2D2T2
W1W2

⇒
7 × 7 × 7
=
5 × 5 × 5
7W2

⇒ 49 × W2 = 125
⇒ W2 =
125
49


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