Plane Crossing

Logic Level 1

Aircraft A travels from Delhi to Kolkata at a constant speed of 500km/hr. Aircraft B takes off at the same time, traveling from Kolkata to Delhi, at a constant speed of 650 km/hr. When the aircrafts meet after 1.5 hours, which one is closer to Delhi?

B Same A

Naman Mittal by Naman Mittal , 22, India

This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try refreshing the page, (b) enabling javascript if it is disabled on your browser and, finally, (c) loading the non-javascript version of this page . We're sorry about the hassle.

5 solutions

Angelo Curcio
Feb 6, 2016

Trick question

5 Helpful 0 Interesting 0 Brilliant 0 Confused

This question is actually flawed. If A is travelling with its tail pointing towards Delhi and B is travelling with its head pointing Delhi, then if they "meet," their heads will be at the same point. However, Aircraft A is still "closer" to Delhi because its tail is closer to Delhi. It also doesn't state at which point do they meet (on the aircraft). It also doesn't specify lengths of either aircraft (thus not allowed the planes to be considered as a "point") nor does it mention the matter of whether the places are identical. Therefore, the only "logical" answer is "Neither," but since that answer does not exist, the next "logical" answer is to be A.

Timothy Vu - 5 years, 4 months ago

Log in to reply

that's exactly what i thought since if they meet it can be assumed that they haven't crossed each other yet and thus the centre of A is still closer to dheli

Wuu Yyiizzhhoouu - 5 years, 4 months ago

They are both at the same point 'X' which is equidistant from either city.

The question should be made into Option form, since there are only 3 possibilities. Also, it might be better for this to be in the Logic Section.

3 Helpful 0 Interesting 0 Brilliant 0 Confused

I agree. The way I see it is that it doesn't tell you the distance between each city so you cannot mathematically solve this problem.

Triston Childs - 5 years, 4 months ago

Not exactly equiditant from both cities because of different speeds

Narciso Junior - 5 years, 4 months ago

Log in to reply

I think what he means is that because they are at the same point (and assuming that the two planes are not two balls of flaming wreckage), one plane's distance from Delhi, Kolkata, Tokyo, or the center of our galaxy is the same as the other. The different speeds mean that both planes are closer to Delhi since Aircraft A is the slower one, but that those speeds are listed in the question is only there to throw us off.

Christopher Peters - 5 years, 4 months ago

Log in to reply

When they meet, the front tips of each plane are at the same point. One could argue that at that moment in time Aircraft A is closer to Delhi by the length of Aircraft A. Just saying.

Thomas Heikkila - 5 years, 4 months ago

This question is actually flawed. If A is travelling with its tail pointing towards Delhi and B is travelling with its head pointing Delhi, then if they "meet," their heads will be at the same point. However, Aircraft A is still "closer" to Delhi because its tail is closer to Delhi. It also doesn't state at which point do they meet (on the aircraft). It also doesn't specify lengths of either aircraft (thus not allowed the planes to be considered as a "point") nor does it mention the matter of whether the places are identical. Therefore, the only "logical" answer is "Neither," but since that answer does not exist, the next "logical" answer is to be A.

Timothy Vu - 5 years, 4 months ago
Charles Dutertre
May 18, 2015

Since they meet, they are at this time at the exact same point in space, and therefore at equal distance to any other point in space, including Delhi : answer 0.

But one could just try the three answers, it would work as well...

1 Helpful 0 Interesting 0 Brilliant 0 Confused

Not equal distance from the cities

Narciso Junior - 5 years, 4 months ago

This question is actually flawed. If A is travelling with its tail pointing towards Delhi and B is travelling with its head pointing Delhi, then if they "meet," their heads will be at the same point. However, Aircraft A is still "closer" to Delhi because its tail is closer to Delhi. It also doesn't state at which point do they meet (on the aircraft). It also doesn't specify lengths of either aircraft (thus not allowed the planes to be considered as a "point") nor does it mention the matter of whether the places are identical. Therefore, the only "logical" answer is "Neither," but since that answer does not exist, the next "logical" answer is to be A.

Timothy Vu - 5 years, 4 months ago
Cool Lol
Feb 7, 2016

When the aircrafts meet, they are in the same place, so same distance.

0 Helpful 0 Interesting 0 Brilliant 0 Confused

This question is actually flawed. If A is travelling with its tail pointing towards Delhi and B is travelling with its head pointing Delhi, then if they "meet," their heads will be at the same point. However, Aircraft A is still "closer" to Delhi because its tail is closer to Delhi. It also doesn't state at which point do they meet (on the aircraft). It also doesn't specify lengths of either aircraft (thus not allowed the planes to be considered as a "point") nor does it mention the matter of whether the places are identical. Therefore, the only "logical" answer is "Neither," but since that answer does not exist, the next "logical" answer is to be A.

Timothy Vu - 5 years, 4 months ago
Arvind Rathore
Feb 7, 2016

Distance travelled by both the planes=relative velocity of approach* time

Here relative velocity(v1+v2) and time is same for both the planes.

0 Helpful 0 Interesting 0 Brilliant 0 Confused

This question is actually flawed. If A is travelling with its tail pointing towards Delhi and B is travelling with its head pointing Delhi, then if they "meet," their heads will be at the same point. However, Aircraft A is still "closer" to Delhi because its tail is closer to Delhi. It also doesn't state at which point do they meet (on the aircraft). It also doesn't specify lengths of either aircraft (thus not allowed the planes to be considered as a "point") nor does it mention the matter of whether the places are identical. Therefore, the only "logical" answer is "Neither," but since that answer does not exist, the next "logical" answer is to be A.

Timothy Vu - 5 years, 4 months ago

0 pending reports

×

Problem Loading...

Note Loading...

Set Loading...