Respuesta :

Arcey
1/3 of an hour is 20mins
multiply 1/2mile*2
and 20mins*2
1mile in 40mins.
1*2.25
40*2.25=90mins
2 1/4 miles in 90mins or an hour and a half
That could also be writen as 
2 1/4 miles in 3/2 hours or 1 1/2 hours
takes her 20 minutes to walk 1/2 a mile 
2 miles=80 minutes 
1/4= 10 minutes i think 
so 80+10=1 1/2