Aptitude - Time and Distance - Discussion
Discussion Forum : Time and Distance - General Questions (Q.No. 5)
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?
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 1 of 21.
Kanmani said:
1 decade ago
How to get 9 km?
Sundar said:
1 decade ago
It is obtained by 54 kmph - 45 kmph = 9 kmph.
Girishkumar said:
1 decade ago
How did 9/54 come?
Shaju said:
1 decade ago
Hey its 54 kmph and 45 kmph. Can you explain how you got 9 km by subtracting the speeds of bus at different circumstances?
Nitesh85 said:
1 decade ago
@Mr.Shaju
54 - 45 = 9 km is absolutely correct because we are calculating relative results.
54 - 45 = 9 km is absolutely correct because we are calculating relative results.
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).
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).
Sam said:
1 decade ago
Why to consider 54 rather than 45?
(1)
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.
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.
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)
Krishna said:
1 decade ago
Excellent explanation thank you JAYA. Thanks a lot.
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