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:
207 comments Page 12 of 21.
Nivas said:
1 decade ago
@saravanakgopi.
What he said is wrong. Because he didn't convert hr into min. So that his method is wrong.
What he said is wrong. Because he didn't convert hr into min. So that his method is wrong.
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:
9 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.
(208)
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:
2 years 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.
(106)
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.
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