If both the red square and the blue square have the same perimeter, and the blue square's dimensions are 5mm and 6mm, and the red rectangle's area is 10mm, what is the dimensions of the red rectangle?

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?