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Numerical Ability
Time Distance and Speed
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?
A. 9 B. 10
C. 12 D. 20
Read Solution (Total 7)
-
- For simplicity, Suppose distance travelled is 270 kms.
Time taken without stppages = 270/54 = 5 hrs
Time taken with stoppages = 270/45 = 6 hrs
time for stoppage in 6 hrs = 6-5=1 hr
time for stoppage in 1 hrs = 1/6 hr = 10 minutes ..... option B
- 13 years agoHelpfull: Yes(18) No(9)
- Due to stoppages it covers 9km
time taken to cover 9km=9/54=1/6hr
60/6=10min - 11 years agoHelpfull: Yes(9) No(2)
- Answer is A. 54KMPH means 900 meters per minute. 45kmph means 750 meters per minutes. 900 * 51 minutes = 45KMph. So 9 minutes, bus was stopped.
- 13 years agoHelpfull: Yes(3) No(17)
- 10 stops per hour
- 13 years agoHelpfull: Yes(3) No(5)
- why not this solution
assume distance =54km
54km/1hr with out stoppages
at same time 54km will cover 45 km/hr with stoppages
54km/45km/hr=6/5hr=1.12hrs
total minutes is 1.12-1=12mins
- 11 years agoHelpfull: Yes(2) No(7)
- because of the stoppages it covers 9km less ...
therfore (9/54*60)=10minutes will be the ans
- 10 years agoHelpfull: Yes(2) No(1)
- answer is 10
- 9 years agoHelpfull: Yes(0) No(0)
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