40 men can build a wall 200 m long in 12 days, working 8h a day. What will be the number of days that 30 men will take to built a similar wall 300 m long, working 6h per days.
Correct Answer: 32
Explanation:
Given, M1 = 40, W1 = 200, T1 = 8, D1 = 12,
M2 = 30, W2 = 300, T2 = 6 and D2 = ?
Then, using formula
M1T1D1W2 = M2T2D2W1
⇒ 40 x 8 x 12 x 300 = 30 x 6 x D2 x 200
∴ D2 = (40 x 8 x 12 x 300)/(30 x 6 x 200) = 32 days.
