During the first 18 minutes of a 1.0-h trip, a car has an average speed of 11 m/s. What must the average speed of the car be during the last 42 minutes of the trip if the car is to have an average speed of 21 m/s for the entire trip?
distance travelled in 18 min is= 11880m total distance =75600m remaining distance= 75600-11880 = 63720m time = 42 min = 2520 sec speed = 63720/2520 = 25.28m/sec
please choose me best and get this one free thanks
Content will be erased after question is completed.
Enter the email address associated with your account, and we will email you a link to reset your password.
Forgot your password?