Question

Megan drove from her house to work at an average speed of 45 miles per hour. The drive took her
20 minutes. If the drive home took her 30 minutes and she used the same route in reverse, what was her average speed going home?

Answer 1

Answer: Speed = distance/time  

distance = 45 miles  

time = 30 minutes = 1/2 hours  

therefore speed = 90 mph  

Question 2  

distance = speed x time  

speed = 7.5  

time = 15 minutes = 1/4 hours  

therefore distance = 15/4 miles  

time = distance/speed  

distance = 15/4 miles  

speed = 8  

time = (15/4)/8 = 15/32 hours

Step-by-step explanation: