First divide 228 miles by 6 hours and u get 38 miles per hour next, divide 285 miles by 38 miles and u get 15/2 or 7.5 hours the answer is 7 and a half hours hope this helps! good luck!
First find out how many miles per hour. 310/5= 62. Divide that number by 60 (60 minutes in an hour). 62/60= 1.033333. Terry drives 1.033333 miles per minute. Multiply 1.033333 times 403 to see how many minutes he drove. 1.033333*403=416.433333. It took Terry 416 minutes or 6 hours and 56 minutes.