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人気のある Word Problems >

Two trains are moving toward each other. One train moves at a speed of 50 mph, and the other train travels at 70 mph. How soon will they meet if the original 距離 between them was 390 miles?

解

Tw o t r ain s a re m o v in g t o w a r d e a c h o t h er . O n e t r ain m o v es a t a s p ee d o f 50 m p h, an d t h e o t h er t r ain t r a v e l s a t 70 m p h . Ho w soo n w i ll t h ey m ee t i f t h e or i g ina l d i s t an ce b e tw ee n t h e m w a s 390 mi l es ?

解

time : 3 \frac{1}{4}

解答ステップ

Translate the problem into an equation:

50 x + 70 x = 390

x

を解く

50 x + 70 x = 390 : x = \frac{13}{4}

仮分数を帯分数に変換する

time : 3 \frac{1}{4}

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