Homework SourseThe time required for a car to travel a certain distance var
The time required for a car to travel a certain distance varies inversely as the rate at which it travels. If it takes 8 hours at 90 miles per hour to travel the distance, how long will it take at 20 miles per hour?
The time required for a car to travel a certain distance varies inversely as the rate at which it travels. If it takes 8 hours at 90 miles per hour to travel the distance, how long will it take at 20 miles per hour?
Solution
Given a car takes 8 hours at 90 miles per hour to travel the distance.
Need to find time taken to travel at 20 miles per hour.
The time required for a car to travel a certain distance varies inversely as the rate at which it travels.
Time = Distance / Speed
Distance = Time *Speed
= 8 * 90
= 720 miles.
Time when distance = 720 miles and Speed = 20 miles per hour
Time = Distance / Speed
= 720 / 20
= 36 hours.
Therefore, the car takes 36 hours to travel distance 720 miles at Speed 20 miles per hour
