Aptitude - Time and Distance - Discussion
Discussion Forum : Time and Distance - General Questions (Q.No. 2)
2.
An aeroplane covers a certain distance at a speed of 240 kmph in 5 hours. To cover the same distance in 1
hours, it must travel at a speed of:
hours, it must travel at a speed of:Answer: Option
Explanation:
Distance = (240 x 5) = 1200 km.
Speed = Distance/Time
Speed = 1200/(5/3) km/hr. [We can write 1 hours as 5/3 hours]
 Required speed = |
 |
1200 x | 3 |  km/hr |
= 720 km/hr. |
| 5 |
Discussion:
160 comments Page 4 of 16.
Naren said:
10 years ago
Here they wrote fraction 5/3 as mixed numbers (1 2/3).
Let me explain how to write it.
Here, the whole number is 1.
The denominator is 3 and the numerator is 2.
I) 1st Multiply the whole number by the denominator. i.e. 3*1=3.
II) Add the result to the numerator: i.e 3+2=5.
III) Now The numerator is 5. The denominator remains 3. --> so 5/3.
We got the output.
Let me explain how to write it.
Here, the whole number is 1.
The denominator is 3 and the numerator is 2.
I) 1st Multiply the whole number by the denominator. i.e. 3*1=3.
II) Add the result to the numerator: i.e 3+2=5.
III) Now The numerator is 5. The denominator remains 3. --> so 5/3.
We got the output.
(4)
Bharath kumar said:
3 years ago
How does 1hr become 5/3?
(4)
Dayakar jitti said:
1 year ago
The given distance is =1200km.
speed =distance/time.
To cover the same is distance in 1^2/3 hours
which means we can write 1 power 2/3 as 1+2/3 therefore convert into fractions as,
1^2/3 = 1 + 2/3 = 3 * 1 + 2/3 which is 5/3 right so
according to the given problem we have to calculate the required speed.
Then speed =(1200 x 3/5)km/hr = 720 km/hr.
speed =distance/time.
To cover the same is distance in 1^2/3 hours
which means we can write 1 power 2/3 as 1+2/3 therefore convert into fractions as,
1^2/3 = 1 + 2/3 = 3 * 1 + 2/3 which is 5/3 right so
according to the given problem we have to calculate the required speed.
Then speed =(1200 x 3/5)km/hr = 720 km/hr.
(4)
Mohit said:
2 decades ago
It is (3*1)+2=5
So it 5/3 hours and now speed = distance/time that's why 3/5.
So it 5/3 hours and now speed = distance/time that's why 3/5.
(3)
Avinash said:
1 decade ago
Ramkumar,nothng hard in tat.first knw formula
distance=speed*time
speed=distance/time
time=speed/distance
now read the question.they given aeroplance covers distance of 240 km/hr in 5 hours so we need the total distance of 5 hours...
distance=speed*time
so distance=240*5=1200km
now we have to speed cover in 1+2/3 hours=5/3 hours
speed=distance/time
speed=(1200/5/3)kmph=(1200*3/5)kmph=720 kmph
distance=speed*time
speed=distance/time
time=speed/distance
now read the question.they given aeroplance covers distance of 240 km/hr in 5 hours so we need the total distance of 5 hours...
distance=speed*time
so distance=240*5=1200km
now we have to speed cover in 1+2/3 hours=5/3 hours
speed=distance/time
speed=(1200/5/3)kmph=(1200*3/5)kmph=720 kmph
(3)
Ajai said:
4 years ago
Speed = distance /time methods is used here.
(3)
Ajith said:
3 weeks ago
So many people is asking 1 2/3 becomes 5/3.
Here is the explanation.
1 2/3 is a mixed fraction so we converted it into an improper fraction.
1 2/3 3 comes to the left side, so it becomes.
1*3 +2/3 = 5/3.
Here is the explanation.
1 2/3 is a mixed fraction so we converted it into an improper fraction.
1 2/3 3 comes to the left side, so it becomes.
1*3 +2/3 = 5/3.
(3)
Saran said:
5 years ago
Distance= 240x5= 1200km.
speed = distance/ time.
=1200/(5/3).
=(1200 x 3)/5,
=3600/5,
=720km/h.
speed = distance/ time.
=1200/(5/3).
=(1200 x 3)/5,
=3600/5,
=720km/h.
(2)
Vaidik said:
4 years ago
According to the tri-rashi method.
5hours ----------->240km/h.
5/3hours ---------> (?).
5 x 240/5 x3 =80kmph.
I know this is wrong but speed should increase here because time is decreasing but I want to know why this method is not applicable here. Please can anyone help me to solve this?
5hours ----------->240km/h.
5/3hours ---------> (?).
5 x 240/5 x3 =80kmph.
I know this is wrong but speed should increase here because time is decreasing but I want to know why this method is not applicable here. Please can anyone help me to solve this?
(2)
Batunde Collines said:
8 months ago
This has been so helpful. Thanks all.
(2)
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers