Two cars travel towards each other on a 400 km stretch of road. One car travels 90 km/h and the other at 70 km/h. How long does it take before they pass each other

Answer 1

Key point:
When they pass each other they both will have traveled the same time

let the distance covered by the faster car be x km
distance covered by slower car = 400 - x km
time of faster car = x/90
time of slower car = (400-x)/70

(400-x)/70 = x/90
(400-x)/7 = x/9
7x = 3600 - 9x
16x = 3600
x = 225

time = 225/90 hrs = 2.5 hours

check:
2.5(90) = 225 km
2.5(70) = 175 km
225+175 = 400 km

Answer 2

Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?
Two cars travel towards each other on a 400 km stretch of road.
One car travels at 90 km/h and the other at 70 km/h. How long
does it take before they pass each other?