Aptitude - Time and Distance - Discussion
Discussion Forum : Time and Distance - General Questions (Q.No. 6)
6.
In a flight of 600 km, an aircraft was slowed down due to bad weather. Its average speed for the trip was reduced by 200 km/hr and the time of flight increased by 30 minutes. The duration of the flight is:
Answer: Option
Explanation:
Let the duration of the flight be x hours.
| Then, | 600 | - | 600 | = 200 |
| x | x + (1/2) |
 |
600 | - | 1200 | = 200 |
| x | 2x + 1 |
x(2x + 1) = 3
2x2 + x - 3 = 0
(2x + 3)(x - 1) = 0
x = 1 hr. [neglecting the -ve value of x]
Discussion:
206 comments Page 13 of 21.
Mangesh said:
1 decade ago
Please tell me in separate steps to solve this example.
Arul said:
1 decade ago
Why 600/x-600/x+1/2 not 600/x+1/2-600/x?
Please clear the concept. I can't understand.
Please clear the concept. I can't understand.
Suchitra said:
1 decade ago
@Mallikarjun.
Why it can't be like?
400 km. > 30 min.
600 km. > ?
Why are you taking 200? 200 is the speed reduced?
So shouldn't you subtract from 600 and take it as 400.
Why it can't be like?
400 km. > 30 min.
600 km. > ?
Why are you taking 200? 200 is the speed reduced?
So shouldn't you subtract from 600 and take it as 400.
Usha said:
1 decade ago
Please explain how 200 will come?
MALLIKARJUN said:
1 decade ago
Simple method.
200 km......> 30 min (30/60 h).
Then 600......> ?
Therefore 600*30/60 = x*200.
x = 60 min.
200 km......> 30 min (30/60 h).
Then 600......> ?
Therefore 600*30/60 = x*200.
x = 60 min.
Dean said:
1 decade ago
1/2 up --> 1/3 down. Therefore, 200 = 1/3 and 1 = 600.
Ramesh said:
1 decade ago
Can any one explain how 200 will come?
Shakila said:
1 decade ago
I agree to @Deepak Jain's word and yes bad weather has it be considered and as tony mentioned 400 is the speed.
Its just simple as much as 1.5 hours.
Its just simple as much as 1.5 hours.
@ngel said:
1 decade ago
= x-(x+1/2) it simplify as,
= x-2x+1 = 0.
= -x+1 = 0.
x = 1.
= x-2x+1 = 0.
= -x+1 = 0.
x = 1.
Rupali said:
1 decade ago
How will solve x-(x+1/2)?
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers