Excluding the stoppages, the speed of a bus is 64 km/hr and including the stoppages the speed of the bus is 48km/hr. For how many minutes does the bus stop per hour?
1) 15 min
2) 10 min
3) 12 min
4) 20 min
5) 18 min

• 1)15 min
  Speed of the bus without stoppage=64 km/hr
  Speed of the bus with stoppage=48km/hr
  Difference in speed=16 km/hr
  
  so,the time taken in the stoppages = time taken to cover 16 km=(16/64)hr = 1/4 hr =15 min
  
• 7 years agoHelpfull: Yes(18) No(2)
• 1) 15 min
  
• 7 years agoHelpfull: Yes(3) No(0)
• simply take LCM of 64 and 48 which is 192 km .
  To cover 192 km with speed of 64 km/hr it would require 3 hrs .
  Then with speed of 48 km/hr it would require 4 hrs to complete 192 km.
  As it require 1 hr ie.. 60 minutes more with speed of 48 km/hr.
  Then divide 60/3=20 min per hr which is the answer clearly
• 7 years agoHelpfull: Yes(2) No(11)
• time=difference in speeds/without stoppage speed
  therefore,time=(64-48)/64
  =1/4hrs
  nothing but 15mins
• 6 years agoHelpfull: Yes(1) No(0)
• Answer
  (1) 15 min
• 7 years agoHelpfull: Yes(0) No(0)