21 km road can be done by 45 workers in 300 days.100 days later only 5 km road is completed. So how many workers should more join to complete work in same time.

• capacity of doing work of a man before and after will be same
  100*45/5=200*x/16
  x=72
  total increase in workers=72-45=27
• 11 years agoHelpfull: Yes(16) No(2)
• 27
  45 Workers---100 days---5 km ---(a)
  so for next 200 days [45 Workers+ Some extra workers] has to complete the work
  45 Workers---200 days---10 km ---(b)
  Remaining work=21-(10+5)=6 km.
  From (b),Workers needed for 6 km= 6*45/10 =27
• 11 years agoHelpfull: Yes(6) No(2)
• applying chain rule
  45:5::x:16
  100:100
  5*100*x=16*100*45
  x=144
  so 144-45=99workers are more needed to built 16 km in 100 days
• 11 years agoHelpfull: Yes(3) No(4)
• M1*d1/w1 = m2*d2/w2
  45*100/5 = x*200/16
  = 72
  more men = 72 - 45 = 27
• 10 years agoHelpfull: Yes(2) No(0)
• yes I was wrong.
• 11 years agoHelpfull: Yes(1) No(3)
• No of workers currently working is not given (it never says that currently there are 45 workers working),
  Work potential, x = 21/(45*300)
  
  if n is number of workers working currently then:
  100 * n * x = 5
  after puting x, n = 32 (apx)
  
  now to complete work(16 kms) in remaning 200 days:
  n' is number of workers
  
  200 * n' * x = 16
  
  after puting x, n' = 50 (apx)
  
  no of workers added = n' - n = 50 - 32
  therefore, Answer = 18
• 11 years agoHelpfull: Yes(1) No(1)
• Total work to be completed = 21+5= 26 km in 300 days
  if we assume that all man have same capacity to do work
  than,
  21 km work can be done by 45 workers in 300 days
  so,21 km work can be done by 1 worker in 300*45 days
  so, 1 km work can be done by 1 worker in 300*45/21
  
  now if total work is increased to 26 km and to complete the work in 300 days than no. of workers have to increase
  let total no. of workers =x
  than,
  according to above procedure,
  we can say that
  1 km work done by 1 worker in 300*x/26 days
  
  capacity of doing work of a worker will be same
  than,
  300*45/21=300*x/26
  by calculation ,
  x=55.7142
  
  but no. of workers can't be fraction
  so, no. of workers will be 56
  before 45 workers are working
  so no. of workers to be increased =56-45=11 Ans.
• 11 years agoHelpfull: Yes(0) No(14)