20 persons can build a house in 60 days. starting this house with 20 person ,5 person left after 5 days . how many days it will take to complete the house.
Answers
Answer:
Assuming this is a simple arithmetical problem we need a inverted “rule of three” or whatever is called in english to solve it.
but doing Step-by-Step, with explanation we need to obtain the number of “man.day” value of that work so we have a fact of 20 guys working for 60 days we get 20x60= 1200 man.day units.
so we now need to finish that work in a 48 days time span so we go to solve 1200/48= 25 man (units as follows man.day/day, leaves only man)
in real world, that is not always the case, because you need to follow a flow chart of works, with some bottlenecks and space constraints, so you could maybe increase the manforce 3fold and only obtain a 3 day reduction in the labour, or you could increase a single man and reduce the time for around 10 days less
Step-by-step explanation:
Assuming this is a simple arithmetical problem we need a inverted “rule of three” or whatever is called in english to solve it.
but doing Step-by-Step, with explanation we need to obtain the number of “man.day” value of that work so we have a fact of 20 guys working for 60 days we get 20x60= 1200 man.day units.
so we now need to finish that work in a 48 days time span so we go to solve 1200/48= 25 man (units as follows man.day/day, leaves only man)
in real world, that is not always the case, because you need to follow a flow chart of works, with some bottlenecks and space constraints, so you could maybe increase the manforce 3fold and only obtain a 3 day reduction in the labour, or you could increase a single man and reduce the time for around 10 days less