Respuesta :

JamesIre
Hi there,

Since Eric ran 200 m/min for 4 minutes, then 4×200 = 800m
and he walked 80 m/min for 8 minutes, then 8×80 = 640m
and in total he ran 800 + 640 = 1440m 
so he still have 1600 - 1440 = 160m left to reach 1600m

Hope this helped :P