Manmohan Singh can walk a certain distance in 40 days when he rest 9 hours a day. How long will he take to walk twice the distance twice as fast and rest twice as long each day?

• he walks 24-9=15 hr a day
  suppose his speed is 1 km /hr
  total time he walked= 15*40=600 hr
  distance covered=600 km
  now distance is twice i.e 1200km
  speed is twice i.e 2 km/hr
  rest is also twice i.e 18 hr a day
  so he walks 6 hr a day
  distance traveled in one day=6*2= 12 km
  total days= 1200/12= 100 days ANS
• 9 years agoHelpfull: Yes(2) No(0)