1.

A job can be completed by 12 men in 12 days. How many extra days will be needed to complete the job if 6 men leave after working for 6 days?

Answer»

6 days



Half the WORK is done by 12 men in 6 days. 

REMAINING half should be done by 6 men in ? days 

Then, 12 × 6 × ½ = 6 × ?days × ½ 

36 = 3 × ?days

? days = 36/3 =12 days 

EXTRA days REQUIRED = 12 -6 = 6 days.



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