The length of an object in feet is equal to three times its length in yards. the length of a water slide is 48 feet. write and solve a multiplication equation to find the length of the water slide in yards

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.