Sasha likes to go biking on the weekends. One Saturday, she leaves home and heads east at 10 AM. She travels 12 miles per hour for three hours, then 18 miles per hour for the next two hours. She turns around to head home after a short water break, how fast does Sasha need to ride, in miles per hour, to get home at 5 PM?	Choose the correct choice:  A) 17  B) 18  C) 19  D) 20  E) 21
She travels 12*2 + 18*2= 
<gadget id="calculator">12*2 + 18*2</gadget>
<output>60</output>
60 miles east in 4 hours, taking a short rest at 2 PM   She needs to travel at (60 miles) / (5 PM - 2PM)= 60 miles / 3 hours = 20 miles per hour   Correct answer: 20
<result>D</result>
Sasha likes to go biking on the weekends. One Saturday, she leaves home and heads east at 10 AM. She travels 12 miles per hour for three hours, then 18 miles per hour for the next two hours. She turns around to head home after a short water break, how fast does Sasha need to ride, in miles per hour, to get home at 5 PM?