20 men can cut 30 tree in 4 h. If 4 men leave the job, how many trees will be cut in 12 h?
Correct Answer: 72
Explanation:
Given, M1 = 20, T1 = 4, W1 = 30,
M2 = 20 - 4 = 16, T2 = 12 and W2 = ?
According to the formula,
M1T1W2 = M2T2W1
⇒ 20 x 4 x W2 = 16 x 12 x 30
∴ W2 = (16 x 12 x 30)/(20 x 4) = 12 x 6 = 72 trees
