a certain no. of workers can do a piece of work in 25 days,in what time will another set of equal no. of men do a piece of work as great supposing that 2 men of the first set can do as much work in a hour as 3 men in the second set can do in a hour?
a)60days b)75days c)90days d)105days e)none

• x persons of first group can do work in 25 days.
  
  2 men of first group = 3 men of second group , then x persons of second group = 2x/3 persons of first group.
  
  x persons of first group can do work in 25 days.
  2x/3 persons of first group can do work in 25 *3/2 = 75/2 = 37.5 days .... none of given options ... so ..e)none
• 13 years agoHelpfull: Yes(19) No(3)
• 2M1=3M2
  efficiency = M1 :M2=3:2
  No of men in 2nd set =N, Hours needed in 2nd set=H
  total 1st set work= efficency*hour*men1 = 3*25*N
  
  2(1st set work)= 2nd set work
  2(3*25*N)=2*N*H
  H = 75
• 6 years agoHelpfull: Yes(2) No(1)
• 2M1=3M2
  efficiency = M1 :M2=3:2
  No of men in 2nd set =N, Hours needed in 2nd set=H
  total 1st set work= efficency*hour*men1 = 3*25*N
  
  2(1st set work)= 2nd set work
  2(3*25*N)=2*N*H
  H = 75
• 6 years agoHelpfull: Yes(2) No(1)