QUESTION: 417

A Barman’s train rails across an open track at 250 kilometers per hour. A regular passenger train travels at 68% of the Barman’s train speed. If the two trains start moving from the same station at the same time, how much time longer will it take the passenger train than the Barman’s to travel 850 kilometers?

2 hours and 24 minutes.
1 hour and 24 minutes.
2 hours and 36 minutes.
1 hour and 36 minutes.
5 hours.

Answer(s): D

Explanation:

Let’s find the time it takes each train to travel 850 km. The fast train: 850 / 250 = 3.4 hours.
The slow train: 0.68 x 250 = 170 km/h. So the time is 850 / 170 = 5 hours. The difference between the travel times is 1.6 hours or 1 hour and 36 minutes.

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QUESTION: 418

A Hawk can glide for 4 consecutive hours without resting using thermals only. An eagle can glide 14.5% longer without resting using the same thermals. If an eagle makes 3 stops during a certain glide, each stop after gliding its maximum possible time, how many hours long was the glide not including the resting time?

18.32.
13.74.
15.66.
9.16.
16.

Answer(s): A

Explanation:

14.5% of 4 are 0.58. Thus, an eagle can fly for 4.58 consecutive hours without resting. Since the eagle rested 3 times, he could glide four periods 4 x 4.58 hours= 18.32 hours.

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