Set X pieces of iron sheet as the box body and Y pieces of iron sheet as the bottom of the box, with the column X+Y =190; 8x*2=22y Solve x= 1 10 and y=80.

the second question

Let the morning speed and ice speed be x and y respectively, and list the equation 25x+25y = 400. (2+3)x=3y Solve x=6, y= 10.