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受欢迎的 Word Problems >

Reggie made a business trip of 244 miles. He averaged 48mph for the first part of the trip and 62mph for the second part. If the trip took 4.5 hours, how long did he travel at each rate?

解答

R e gg i e ma d e a b u s in ess t r i p o f 244 mi l es . He a v er a g e d 48 m p h f or t h e f i rs t p a r t o f t h e t r i p an d 62 m p h f or t h e seco n d p a r t . I f t h e t r i p t oo k 4.5 h o u rs, h o w l o n g d i d h e t r a v e l a t e a c h r a t e ?

解答

trip 1 time : 2.5

trip 2 time : 2

求解步骤

Translate the problem into an equation:

48 x + 62 (4.5 - x) = 244

求解

x, 48 x + 62 (4.5 - x) = 244 : x = \frac{5}{2}

找到 time

trip 1 time : 2.5

trip 2 time : 2

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