Question

Two vans leave a campground at the

same time. One is traveling north at a
speed that is 10 miles per hour faster
than the other, which is traveling south.
After 2.5 hours, the vans are 255 miles
apart. What is the speed in miles per hour
of the van traveling south?

Answer 1

92 mph

Explanation:

Let the speed of the van travelling south

=

v

mph

The distance travelled by the car travelling north is

d

1

=

10

⋅

2.5

=

25

The distance travelled by the car travelling south is

d

2

=

v

⋅

2.5

=

2.5

v

The distance between the cars after

2.5

h

is

d

1

+

d

2

=

255

25

+

2.5

v

=

255

2.5

v

=

255

−

25

=

230

v

=

230

2.5

=

92

mph

The speed is

=

92

mph