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:
205 comments Page 10 of 21.
Raju said:
1 year ago
Speed1 = 54kmp
Speed2 = 45kmph
By ratio method:
Speed diff is 9kmph.
It means the distance is 9 km.
Time = distance/speed
t = 9/54 = 1/6 hr.
Time = 10 min.
Speed2 = 45kmph
By ratio method:
Speed diff is 9kmph.
It means the distance is 9 km.
Time = distance/speed
t = 9/54 = 1/6 hr.
Time = 10 min.
(88)
Aarman said:
1 decade ago
Because @Chandini bus is going on 54 km without stopped and 45 is this stopped time the bus that why here when the bus stopped then bus is loss a time.
Manish Pillai said:
9 years ago
This can be done using allegations easily.
54 0
45
45 : 9
That is 5:1.
So, it should not travel for 1/6 of an hour that is 10 min.
54 0
45
45 : 9
That is 5:1.
So, it should not travel for 1/6 of an hour that is 10 min.
Ajit said:
1 decade ago
Simple is that you hav to calculate the wasted time=time taken by bus to cover 9kms).
In one min it covers 0.9 kms.
For 9kms-?min.
You get 10min.
In one min it covers 0.9 kms.
For 9kms-?min.
You get 10min.
Ashish said:
1 decade ago
For all those who got answer as 12.
12 min is the stoppage time for (60+12) min i.e 72 min. So, for 60 min. i.e 1 hr it would be 60* 12/72=10 min.
12 min is the stoppage time for (60+12) min i.e 72 min. So, for 60 min. i.e 1 hr it would be 60* 12/72=10 min.
Swetha said:
1 decade ago
I have the same doubt that what rahul having..if we subtracting two speeds ,then we will get difference in speed na? how we got the distance 9 km?
Madan said:
9 years ago
Explanation:
Excluding stoppages (ES) - 54.
Including stoppages (IS) - 45.
Formula: (ES - IS)/ ES.
=> (54 - 45)/54 = 9/54 = 1/6 hrs (or) 10 mins.
Excluding stoppages (ES) - 54.
Including stoppages (IS) - 45.
Formula: (ES - IS)/ ES.
=> (54 - 45)/54 = 9/54 = 1/6 hrs (or) 10 mins.
Tiru said:
8 years ago
@All.
if ans 10mins, 54*60 = 45*(60+10) which is not correct
if ans 12 mins, 54*60 = 45*(60+12) which is correct
So ans is 12 mins, not 10 mins.
if ans 10mins, 54*60 = 45*(60+10) which is not correct
if ans 12 mins, 54*60 = 45*(60+12) which is correct
So ans is 12 mins, not 10 mins.
Afsar said:
1 decade ago
How it take 9km. ?
It is because there is no time limit given so.
We take reference time 1hr. And each having same time.
So distance=speed*time.
It is because there is no time limit given so.
We take reference time 1hr. And each having same time.
So distance=speed*time.
Murali said:
1 decade ago
Excluding stoppages= (difference of speeds/excluding Stoppage) *60mins.
= (54-45/54) *60mins.
= (9/54) *60mins.
= (1/6) *60mins.
=10mins.
= (54-45/54) *60mins.
= (9/54) *60mins.
= (1/6) *60mins.
=10mins.
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