The length of the track is 210 miles a train departs London at 1120 and arrives in Manchester at 1328 the average speed is 104miles per hour

Your answer would be ahere is how: perimeter is how long all the sides are. in a rectangle, there are two sets of parallel sides. so, to find this, we would to the following.(15x2)+(4x2)30+838if you have questions ask! and mark me brainliest! i really wanna level up : 3