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23 Apr 2018, 21:47
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D
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Question Stats:
78% (00:59) correct
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How many kilometers is the flight from city A to city B?
(1) Traveling at a speed of 270 kilometers per hour, the flight from city A to city B takes 20/3 hours.
(2) Traveling at a speed of 300 kilometers per hour, the flight from city A to city B takes 40 minutes less than when traveling at a speed of 270 kilometers per hour.
(1) Traveling at a speed of 270 kilometers per hour, the flight from city A to city B takes 20/3 hours.
(2) Traveling at a speed of 300 kilometers per hour, the flight from city A to city B takes 40 minutes less than when traveling at a speed of 270 kilometers per hour.
23 Apr 2018, 22:00
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How many kilometers is the flight from city A to city B?
(1) Traveling at a speed of 270 kilometers per hour, the flight from city A to city B takes 20/3 hours.
(2) Traveling at a speed of 300 kilometers per hour, the flight from city A to city B takes 40 minutes less than when traveling at a speed of 270 kilometers per hour.
1) Speed = distance / time
therefore, Speed x Time = Distance
270 x (20/3) = Distance ------ Sufficient
2) Let the distance from A to B be Y and the time taken for traveling at speed of 270 km/hr be X hrs
therefore, 270*X = Y
and 300 (X-40) = Y
So 270*X = 300 ( x - 40)
solving for X and replacing it in any of the two equations will give us the distance ------ Sufficient
Answer - D
(1) Traveling at a speed of 270 kilometers per hour, the flight from city A to city B takes 20/3 hours.
(2) Traveling at a speed of 300 kilometers per hour, the flight from city A to city B takes 40 minutes less than when traveling at a speed of 270 kilometers per hour.
1) Speed = distance / time
therefore, Speed x Time = Distance
270 x (20/3) = Distance ------ Sufficient
2) Let the distance from A to B be Y and the time taken for traveling at speed of 270 km/hr be X hrs
therefore, 270*X = Y
and 300 (X-40) = Y
So 270*X = 300 ( x - 40)
solving for X and replacing it in any of the two equations will give us the distance ------ Sufficient
Answer - D
23 Apr 2018, 22:52
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My answer is D as
Distance = Speed * Time
A. we know speed and time -> sufficient
B. By knowing 300km/h takes 40 mins more than 270km/h -> also know time -> sufficient
Distance = Speed * Time
A. we know speed and time -> sufficient
B. By knowing 300km/h takes 40 mins more than 270km/h -> also know time -> sufficient
