A alone can do a piece of work in 8 days and B alone in 10 days. A and B undertook to do it for Rs. 3600. With the help of C, they completed the work in 4 days. How much is to be paid to C?
A)Rs. 1440 B)Rs. 800 C)Rs. 360 D)Rs. 720

• Ans:A------DAY 8 efficiency----5
  B------DAY 10 EFFICIENCY-4
  A+B+C-------DAY4 EFFICIENCY-10
  SO 'C' EFFICIENCY IS 1
  "C" TO BE PAID= (1/10)*3600=360
• 4 years agoHelpfull: Yes(0) No(1)
• c's one day work=1/4-(1/8+1/10)
  =1/40
  ratio a:b:c =1/8:1/10:1/40
  =5:4:1
  so, c's share 1/10*3600=360.
• 4 years agoHelpfull: Yes(0) No(0)
• C's one day's work = (1/4) - (1/8+1/10) = 1/40
  A's wages : B's wages : C's wages = (1/8) : (1/10) : (1/40) = 5 : 4 : 1
  
  C's share (for 4 days) = 4 * (1/40) * 3600 = 360
• 4 years agoHelpfull: Yes(0) No(0)