Two trains start out at two different stations. The trains are 3 619 km apart. The trains start travelling towards each other. One train is travelling at 270 km/h and the other train at 247 km/h.If both trains started their journey at the same time, how long will they take to pass each other?

解答

Tw o t r ain s s t a r t o u t a t tw o d i ff ere n t s t a t i o n s . T h e t r ain s a re 3619 km a p a r t . T h e t r ain s s t a r t t r a v e ll in g t o w a r d s e a c h o t h er . O n e t r ain i s t r a v e ll in g a t 270 km / h an d t h e o t h er t r ain a t 247 km / h . I f b o t h t r ain s s t a r t e d t h e i r j o u r n ey a t t h e s am e t im e, h o w l o n g w i ll t h ey t ak e t o p a ss e a c h o t h er ?

time : 7

求解步骤

Translate the problem into an equation:

270 x + 247 x = 3619

求解

x, 270 x + 247 x = 3619 : x = 7

time : 7