Question

Eric lives 21 miles away from where he works. After leaving his workplace, he drives at a constant speed of 42 miles per hour for 12 minutes. If Eric continues driving at this speed, how many more minutes will it take him to reach home?

Answer 1

He's driving 42mph. 42m/60h=0.7mpm. 12 minutes x 0.7 mile per minute= 8.4 miles.  21-8.4=12.6 miles left .  12.6 x 0.7= 8.86 minutes left or about nine