Sita can finish some work in 12 days working 4 hours a day.Gita can finish the same in 15 days working 3 hours a day.In how many days can they finish it working together at 4-1/2 hours a day?

• Sita takes 48 hrs to complete the work which can be completed by gita in 45 hrs
  together they will do 1/48+1/45=(31/720)th work in 1 hr.
  or they will together take 720/31 hrs to complete the whole work..
  now if they do work at the rate of 9/2 hrs per day then work will be completed in 5 (5/31) days
• 12 years agoHelpfull: Yes(5) No(3)