exam Maths Puzzle Numerical Ability

a plane took 1 hour longer to travel 560 miles on the first portion of a flight than it took to fly 480 miles on the second portion. If the speed was the same for each portion, what was the flying time for second part of the trip?

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Can someone help me on this problem?

I need to find the first and third quartiles, Q1 and Q3, of the following set of numbers:

0.16, 0.08, 0.27, 0.20, 0.22, 0.32, 0.25, 0.18, 0.28, 0.27

Thank you,
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