A jet airliner flies at 300 mph for the first half hour and last half hour of a flight. The rest of the time it flies at 600 mph. How long does it take to fly a distance of 2100 miles?

Solution

Solution

time : 3 \frac{1}{2}

Solution steps

Translate the problem into an equation:

2100 = 600 x

Solve for

x, 2100 = 600 x : x = \frac{7}{2}

Convert improper fractions to mixed numbers

time : 3 \frac{1}{2}

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