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Popolare Word Problems >

A train traveled at the same speed for 3 hours. It went 77.6 miles in all. To the nearest thousandth of a mile per hour, how fast was the train going?

Soluzione

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 3 h o u rs . I t w e n t 77.6 mi l es in a ll . T o t h e n e a res t t h o u s an d 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 ?

Soluzione

speed : 25.86666 \dots

Fasi della soluzione

Translate the problem into an equation:

77.6 = x \cdot 3

Risolvi per

x, 77.6 = x \cdot 3 : x = 25.86666 \dots

speed : 25.86666 \dots

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