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

• due to stoppages ,it covers 9km less
  
  Time taken to cover 9km=((9/54)*60)=10min
• 11 years agoHelpfull: Yes(2) No(1)
• let distance is x.then without stoppage, the time taken to cover a distance x/54
  similarly with stoppage, time=x/45. taking ratio of both,45/54=5/6 so,
  5/6 so, every 5 hour there is one extra hour.
  5/6=1/1.2 so, in one hour there is extea 0.2hour=12 minutes
  12mins= ans.
• 11 years agoHelpfull: Yes(0) No(0)
• ans is 10 mins.
  as we know excluding stoppages its 54 kmph so
  54 km can be traveled in 1 hour
  so 1 km can be travelled in 1/ 54 hour
  45 km can be travelled in 45 / 54 hour or (45/54) * 60 = 50 min
  so it stops for 60 - 50 = 10 mins
• 11 years agoHelpfull: Yes(0) No(0)