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受欢迎的 Word Problems >

Two men who are traveling in opposite directions at the rate of 45 and 55 mph respectively started at the same time at the same place. In how many hours will they be 280 apart?

解答

Tw o m e n w h o a re t r a v e l in g in o pp os i t e d i rec t i o n s a t t h e r a t e o f 45 an d 55 m p h res p ec t i v e l y s t a r t e d a t t h e s am e t im e a t t h e s am e pl a ce . I n h o w man y h o u rs w i ll t h ey b e 280 a p a r t ?

解答

time : 2 \frac{4}{5}

求解步骤

Translate the problem into an equation:

45 x + 55 x = 280

求解

x, 45 x + 55 x = 280 : x = \frac{14}{5}

将假分式转换为带分数

time : 2 \frac{4}{5}

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