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 19 of 21.
Manasi said:
1 decade ago
Awesome @Saravanakgopi.
Thanks dude.
Thanks dude.
Anu said:
1 decade ago
@Saravanakgopi tell me how you get 5400 in your result.
Madhu said:
1 decade ago
Excellent saravanakgopi.
Pavan said:
1 decade ago
Helloo kiran I have 1 doubt you say that x is in hr so 3 you taken as x/2 but we dnt't know what is x value it may be 2hr 3hr. Then how you will take 3min=x/2.
Saravanakgopi said:
1 decade ago
Another method: We know
Speed = Distance covered/ time taken
speed = 200km/hr
Distance=600km
time=x+30 (30 min. increase)
Apply the formule:
200 =600/x+30
200(x+30)=600
200x =5400
x = 27 min.
Now Time = x+30 so 27+30= 57 Min. Approx 1 Hr.
Speed = Distance covered/ time taken
speed = 200km/hr
Distance=600km
time=x+30 (30 min. increase)
Apply the formule:
200 =600/x+30
200(x+30)=600
200x =5400
x = 27 min.
Now Time = x+30 so 27+30= 57 Min. Approx 1 Hr.
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
Hemant said:
1 decade ago
(2x+1)(600)-1200x=200(2x^2 +x)
2x^2 +x=3
explain
2x^2 +x=3
explain
Chris said:
1 decade ago
Please can anyone tell me what is the LCM taken?
Karthik said:
1 decade ago
(600/x)-600/(x+1/2)=200
(600/x)-600*2/(2x+1)=200
take LCM we will get
(600(2x+1)-600*2*x)/x*(2x+1)=200
600(2x+1)-600*2*x=200*x*(2x+1)
600(2x+1)-200*x*(2x+1)=600*2*x
i think now it ll b easy to simply
(600/x)-600*2/(2x+1)=200
take LCM we will get
(600(2x+1)-600*2*x)/x*(2x+1)=200
600(2x+1)-600*2*x=200*x*(2x+1)
600(2x+1)-200*x*(2x+1)=600*2*x
i think now it ll b easy to simply
Appu said:
1 decade ago
Can anybody solve (600/x)-600(x+1/2)=200?
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