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受欢迎的 Word Problems >

A train traveled at the same speed for 84 hours. It went 3,510.2 miles in all. To the nearest tenth of a mile per hour, how fast was the train going?

解答

A t r ain t r a v e l e d a t t h e s am e s p ee d f or 84 h o u rs . I t w e n t 3, 510.2 mi l es in a ll . T o t h e n e a res t t e n t h o f a mi l e p er h o u r, h o w f a s t w a s t h e t r ain g o in g ?

解答

speed : 41.78809 \dots

求解步骤

Translate the problem into an equation:

3510.2 = x \cdot 84

求解

x, 3510.2 = x \cdot 84 : x = 41.78809 \dots

speed : 41.78809 \dots

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