Sadie adds water to a soil sample at an average rate of three full containers every 10 minutes. Each container holds 2 L when full. How much water will Sadie add in a half hour?
Not that great at maths so bear with me. To find out how many containers she used: 30/10 = 3 So 3x3 is 9 then x by two to find out how much water : 9x2=18
