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Aptitude - Time and Distance - Discussion

Discussion Forum : Time and Distance - General Questions (Q.No. 5)
Time and Distance
5.
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?
9
10
12
20
Answer: Option
Explanation:

Due to stoppages, it covers 9 km less.

Time taken to cover 9 km = 9 x 60 min = 10 min.
54

Discussion:
204 comments Page 20 of 21.
Kushal said:   1 decade ago
60 mins(1hr)--------------->54kms
???mins--------------------->9kms
solving we get the ans:-)
Sumit said:   1 decade ago
Jaya your are great.
Ankit said:   1 decade ago
Great jaya. !
Ravindhar reddy said:   1 decade ago
great explanation .
thank you jaya.
Krishna said:   1 decade ago
Excellent explanation thank you JAYA. Thanks a lot.
Jaya said:   1 decade ago
The easy method: For 1 hour the bus travels for 54 km then for one min its 54/60=0.9km.

So if the bus stops for one minute it travel 0.9 km less so if the bus travels 9 km less then it might stopped for 10 min.
(4)
Ranjit said:   1 decade ago
First we have to see what they asked. For how many minutes does the bus stop per hour. For that we have to consider the value 54 (exclude stoppages) ie. , if we consider the value 45 the bus has been already stopped so we are considering value 54.
Sam said:   1 decade ago
Why to consider 54 rather than 45?
(1)
Nitesh Nandwana said:   1 decade ago
@Girishkumar hi itz simple.

Because 54km in 1 hour.

So 1 km in 1/54 hour.

So 9 km in 9* (1/54) *60 min (1 hour = 60 min).
Nitesh85 said:   1 decade ago
@Mr.Shaju

54 - 45 = 9 km is absolutely correct because we are calculating relative results.
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