I need help solving this word problem. What are the steps to solving the problems. Joshua walks the length of three trails on a hike. The first trail is 3.6 kilometers long. The second trail is 3.7 kilometers long. The third trail is 600 meters shorter than the sum of the lengths of the first two trails. Joshua walks at an average speed of 3 kilometers per hour over the entire hike. How many minutes does it take Joshua to complete his hike?