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 12 of 21.
Zary said:
2 decades ago
Hi frnds! I'm not getting why you are taking.
600 - 600 = 200.
X x + (1/2) ?
Please explain in detail!
600 - 600 = 200.
X x + (1/2) ?
Please explain in detail!
Kush said:
1 decade ago
Why there is always subtraction in the formula?
i.e. 600/x - 600/(x+.5) = 200.
Why "-" ?
i.e. 600/x - 600/(x+.5) = 200.
Why "-" ?
Srinu said:
8 years ago
Why should we take the diff between the velocity's as reduced speed?
Please briefly explain any one.
Please briefly explain any one.
Mary grace said:
3 years ago
D = 600km.
Speed = 200km/hr,
Time = ?( 30 mins increases).
30T = d/s.
30t = 600/200.
30t = 3,
T = 1.
Speed = 200km/hr,
Time = ?( 30 mins increases).
30T = d/s.
30t = 600/200.
30t = 3,
T = 1.
(207)
Babita said:
1 decade ago
@Manik , Sunita ,
200 = 600/x+30
200(x+30)=600
200x+6000=600
200x=600-6000
200x=5400
x=5400/200
x=27
200 = 600/x+30
200(x+30)=600
200x+6000=600
200x=600-6000
200x=5400
x=5400/200
x=27
Shyam kumar said:
1 year ago
D = S * T.
600 = 200 * (T+30),
600/200 = T+30.
T = 27.
TOTAL DURATION = T+30= 27+30 = 57 ~1HOUR.
600 = 200 * (T+30),
600/200 = T+30.
T = 27.
TOTAL DURATION = T+30= 27+30 = 57 ~1HOUR.
(102)
Amit said:
1 decade ago
We know that 1/x inc in one quantity leds to 1/(x+1) dec in other quantity
1/(x+1)= 1/2
=> x=1
1/(x+1)= 1/2
=> x=1
Reeta said:
1 decade ago
600/x-1200/(2x+1) = 200
divide eq by 100,we get the eq.
6/x-12/(2x+1) = 2
Now its simple to solve
divide eq by 100,we get the eq.
6/x-12/(2x+1) = 2
Now its simple to solve
Swetha said:
1 decade ago
Please solve this equation 600/x-600/x+1/2=200 I can't understand. As it followed a long solution.
Hari said:
1 decade ago
It's so simple like.
T= D/S => 600/300=30.
As it is given + 30 mins then 30+30 is 60=1 hour.
T= D/S => 600/300=30.
As it is given + 30 mins then 30+30 is 60=1 hour.
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