300 men can construct a200m long wall in 12 days working 8 hours a day. In how many days can 120 men construct 180 m long wall working 9 hours per day

Monjur Alahi

300 men can construct a200m long wall in 12 days working 8 hours a day. In how many days can 120 men construct 180 m long wall working 9 hours per day?


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Salim Ahmed Kawsar

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\(\frac{M_1D_1H_1}{W_1}=\frac{M_2D_2H_2}{W_2}\) 

M1 = 300, D1 = 12, H1 = 8, W1 = 200

M2 = 120, D2 = ? H2 = 9, W2 = 180

\(\frac{300\times12\times8}{200}=\frac{120\times D\times7}{180}\)

D = 24 days

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