Question

Two buses left the same station and traveled in opposite directions. One of the buses travels at 65 km/h while the other at 70 km/h. In how many hours will they be 540 km apart

Solution please​

Answer 1

Answer:

Distance each bus travels is given as d=tr where

- d is distance bus travels

- t is a time bus travels

- r is a speed of the bus

:

Distance first bus travels for 4 hours is d1=4r.

Distance other bus travels for 4 hours is d2=4(r+12).

:

Total distance between them is 480 miles and since they go in opposite directions this distance is sum of distances each bus travels.

:

d1+d2=480

4r+4(r+12)=480

4r+4r+48=480

8r+48=480

8r=432

r=432/8

r=54 mph, this is a speed of the first bus

:

r+12=66 mph, this is a speed of the second bus

Answer 2

$910 \: hrs {}^{}$