Excluding stoppages, the speed of a bus is 54kmph and including stoppages, it is 45 kmph. For how many minutes the bus stop per hour ?

a. 9
b. 10
c. 11
d. 12

• Due to stoppages, it covers 9 km less.
  Time taken to cover 9 km = (9/54 x 60) min = 10 min.
  
• 10 years agoHelpfull: Yes(39) No(0)
• 10min
  54-45=9
  9/54*60=10
  
• 10 years agoHelpfull: Yes(3) No(1)
• distance travelled in 1 min = 45/60=0.75
  distance travelled less =9 km
  time taken = 9/.75=12min
• 10 years agoHelpfull: Yes(3) No(8)
• 9/54*60=10 minutes
• 10 years agoHelpfull: Yes(2) No(1)
• ans: 10 min.
  Due to stoppages,it covers 9 km less.
  Time taken to cover 9km=9*60/54=10min.
• 10 years agoHelpfull: Yes(2) No(1)
• ratio of speed of bus with stoppage to without stoppage=45/54 = 5:6
  ratio of time of bus with stoppage to without stoppage=6:5
  i.e bus is taking 1 extra hour to cover its journey bcuz of stoppage.
  1 hr. extra for stoppage/total journeey time= 1hr/6hr= 10 mins.
• 10 years agoHelpfull: Yes(1) No(0)
• 9min
  54-45=9
• 10 years agoHelpfull: Yes(0) No(7)
• 10mins stoppage
• 10 years agoHelpfull: Yes(0) No(0)