Naomi drives to the beauty parlor in 60 minutes. On the way back, her average speed is half the average speed as it was to the way to the parlor. How much time will it take Naomi to travel two round trips to the beauty parlor? Select:
A) 3 hours.  B) 4 hours.  C) 4 hours and 20 minutes.  D) 5 hours and 50 minutes  E) 6 hours.
s1=2s2   since, speed is inversely proportional to time   we have,   s1/s2=2/1= 
<gadget id="calculator">2/1</gadget>
<output>2</output>
t2/t1   therefore , the time taken for one trip= 60+120= 
<gadget id="calculator">60+120</gadget>
<output>180</output>
180 minutes   total= 180*2= 
<gadget id="calculator">180*2</gadget>
<output>360</output>
360 minutes= 6 hours   ANSW6 hours.R:6 hours.
<result>E</result>
Naomi drives to the beauty parlor in 60 minutes. On the way back, her average speed is half the average speed as it was to the way to the parlor. How much time will it take Naomi to travel two round trips to the beauty parlor?