100 Men were employed to finish a work in 180 days After 60 days it was found that only 1 5 of the w...........

Quant (SSC) Time and work

100 Men were employed to finish a work in 180 days. After 60 days it was found that only 1/5 of the work was done. How many more men must be employed to finish the work in the stipulate1d time ?

100

200

300

150

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Explanation:

By product constancy
M1 × D1 /W1 = M2 × D2 /W2
= 100 × 60 / 1/5
= a × 60 / 1 - 1/5
⇒ a = 200
⇒ Total workers = 200
⇒ Extra men required = 200 - 100 = 100