An airplane took off from airport P and later landed at airport R at

Question

An airplane took off from airport P and later landed at airport R at the same time that another airplane landed at airport R, completing its flight from airport Q. If both flights were nonstop flights, which airplane flew at the faster average speed?

(1) The first plane took off a half hour before the second plane.

(2) The distance from P to R is greater than the distance from Q to R.

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Aboyhasnoname · Answer

Thinks the answer is E...

Arrival time is same... 
We don’t know travel time... 
We don’t know speed or distance..

Statement 1.
1st plane travelled for 30 mins more... don’t know distance.. cant say anything.

2.⁠ ⁠Distance of 1st plane is more... don’t know times taken...

Now For plane 1...

D is more and t is more... Average speed could be same as plane 2...

Could be less also...

As we don’t know values of anything....

Hope I am correct 😓 😓 
Nice Question though

Crisss03 · Answer

The first one alone isn't enough--> it doesn't consider distance.
The second one alone isn't enough--> P distance is greater, but it could have taken off before Q.

Without the actual distance, we cannot say if those 30 mins are compensated by the distance or not, so E

Souradeep17 · Answer

Given information P----->R<------Q

Option 1:
P took off .5 hours earlier than Q 
But we can't say anything about distance it covered. (N.s)

average speed = total dist./total time

So, its dependent on time and distance.

Option 2:
Distance from P to R > Q to R

Now no info about time hence (N.S)

Option 3:
P to R has more time and distance than Q to R

but still we can't say that average speed is also more as it is the ratio of distance by speed. Hence (N.S)

Option E

stne · Answer

Each individually is INSUFF.

We can use some values to see how this works.

We know speed = Distance/Time

Is  \frac{d_1}{t_1} > \frac{d_2}{t_2}

Where  d_1  is distance from P to R and  t_1  is time from P to R
Where  d_2  is distance from Q to R and   t_2  is time from Q to R

\frac{5}{1.5} > \frac{4}{1}   NO

\frac{7}{1.5} > \frac{4}{1}   YES

INSUFF.

Hope it helped.

An airplane took off from airport P and later landed at airport R at

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GMAT Data Sufficiency (DS) Questions

An airplane took off from airport P and later landed at airport R at

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