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Популярное Word Problems >

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 расстояние of 2100 miles?

Решение

A j e t ai r l in er f l i es a t 300 m p h f or t h e f i rs t ha l f h o u r an d l a s t ha l f h o u r o f a f l i g h t . T h e res t o f t h e t im e i t f l i es a t 600 m p h . Ho w l o n g d oes i t t ak e t o f l y a d i s t an ce o f 2100 mi l es ?

Решение

time : 3 \frac{1}{2}

Шаги решения

Translate the problem into an equation:

2100 = 600 x

Решите для

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

Преобразуйте неправильные дроби в смешанные числа

time : 3 \frac{1}{2}

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