Two trains leave stations 230 miles apart at the same time and travel toward each other. One train travels at 85 miles per hour while the other travels at 70 miles per hour. How long will it take for the two trains to meet?

해법

Tw o t r ain s l e a v e s t a t i o n s 230 mi l es a p a r t a t t h e s am e t im e an d t r a v e l t o w a r d e a c h o t h er . O n e t r ain t r a v e l s a t 85 mi l es p er h o u r w hi l e t h e o t h er t r a v e l s a t 70 mi l es p er h o u r . Ho w l o n g w i ll i t t ak e f or t h e tw o t r ain s t o m ee t ?

time : 1 \frac{15}{31}

솔루션 단계

Translate the problem into an equation:

85 x + 70 x = 230

x

해결 대상

, 85 x + 70 x = 230 : x = \frac{46}{31}

부적절한 분수를 혼합 숫자로 변환

time : 1 \frac{15}{31}