Usually folks figure sand at 100 pcf. There are 27 cubic feet in a cubic yard. So to continue the answer the previous poster made... Using the 100 pcf average weight for sand, and that there are 27 cubic feet in a yard, then 2 yards is equal to 54 cubic feet and at 100 pcf, the total weight is 5400 lbs, or 2.7 tons.
The walking distance measure denotes the distance that can be travelled by walking in a fixed amount of time. In Japan, the standard measure for walking distance is 80 meters for 1 minute of walking time. It is the standard used in real estate listings. For example, if a building is a 10 minute walk from a particular park or train station, it is 800 meters away.
Since then, the suggestion has been studied and found to have significant health benefits, especially for people who live a more sedentary life. Walking 10,000 steps equates to about five miles a day, which is quite an increase for those who sit at a desk all day. It comes out to about 90 active minutes a day, which is three times the amount recommended by the U.S. Centers for Disease Control and Prevention. Instead, it recommends adults engage in 150 minutes of moderate activity a week, such as brisk walking.