Rico can walk 3 miles in the same amount of time that Donna can walk 2 miles. Rico walks at a rate 2 miles per hour faster than Donna.

Let Donna's rate be R

And Rico's rate is R + 2

And we know that

R / [ R + 2 ]  = 2 / 3    cross-multiply

[ R + 2 ] * 2  =  3R

2R + 4  = 3R     subtract 2R  from  both sides

4  = R  = Donna's Rate  = 4 mph

And Rico's rate  =  6 mph

And 2 hrs 10min  =  2 + 1/6 hrs  =  13/6 hrs

So...Rate  * Time  = Distance

6 * (13/6)   =   

13 miles 

Haha ....Rico is turning in 10 minute miles....THAT is NOT walking...that is jogging!