Ramu starts from P towards Q at a speed of 30 kmph and after every 12 min increase his speed by 5 kmph. If the distance between P and Q is 52 km, then how much time does he take to cover the distance?
a)60 min b)72 min c)90 min d)120 min

• in 12 min he travel=30*12/60=6km
  remaining dist.=52-6=46km
  in next 12 min he travel=35*12/60=7km
  remaing=46-7=39
  and so on
  
  or
  6+7+8+9+10+11=51km
  72 min approx
• 8 years agoHelpfull: Yes(0) No(0)