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unable to understand AND concept in men, women, boys girls etc. what is the approac using efficiency method A work is done by hiring some men and some boys. The work requires constructing a wall or breaking a wall. Each of these men or boys can either construct the wall or break the wall. During working, the speed of each man or boy to construct the wall is 10 times the speed of each man or boy respectively to break the wall. It is known that the speed of each man is the same and the speed of each boy is also the same and not equal to that of each man. One man & 7 boys can break the wall in 6 days while 1 man & 3 boys can build the wall in 1 day. In how many days will 1 man and 1 boy together break a wall?

unable to understand AND concept in men, women, boys girls etc. what is the approac using efficiency method A work is done by hiring some men and some boys. The work requires constructing a wall or breaking a wall. Each of these men or boys can either construct the wall or break the wall. During working, the speed of each man or boy to construct the wall is 10 times the speed of each man or boy respectively to break the wall. It is known that the speed of each man is the same and the speed of each boy is also the same and not equal to that of each man. One man & 7 boys can break the wall in 6 days while 1 man & 3 boys can build the wall in 1 day. In how many days will 1 man and 1 boy together break a wall?