SOLUTION: A can make a wall in 10 days, B can make in 20 days and C cn make in 30 days. If A is assisted by B and C trun by trun in alternate days respectively. In how many days the wall has
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Question 761361: A can make a wall in 10 days, B can make in 20 days and C cn make in 30 days. If A is assisted by B and C trun by trun in alternate days respectively. In how many days the wall has been completed?
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
Principle 1: Number of walls built is directly proportional to number of builders. (i.e. more builders, more walls built)
Principle 2: Time taken to build walls is inversely proportional to number of builders (i.e. if you have more builders, it will take a lesser time to build the same number of walls)
Principle 3: Number of walls is directly proportional to the time taken. (i.e. if you have more walls to build, it will take longer - if the number of builders is the same)
given that:
can make a wall in days
can make of a wall in day
can make in days
can make of a wall in day
can make in days
can make of a wall in day
all together
rate
so, solve for
days or days and hours
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