5. A truck going 85 km per hour on a north-south highway crosses and east-west highway just as a car going west at 110 km per hour is approaching the intersection from 400 meters away. How far apart are the car and truck 20 minutes later? (Hint: Remember that the second car does not begin the 20-minute travel at the intersection.)
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The car crosses the east-west highway, and the truck is 400 meters away on the north-south highway. Show more…
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