Oliveryoshidaid
Answered

Trains A and B start from the same station and run in opposite directions at an average rate of 80 kilometers per hour and 92 kilometers per hour, respectively. In how many hours will they be 473 km apart?

Sagot :

Mlcparra16id
           A             B
d    |   80t           92t
t     |     t              t
r     |   80            92

473 = 80t + 92t
473 = 172t
473/172 = t
2 3/4 = t
2 hrs 45 mins = t

They will be apart in 2 and 3/4 hours or 2 hours and 45 minutes.