Joe filled a 10 cup watering can with water He then poured some of the water on his tomato plants How can Joe find out how much water he used for his tomato plants a tape measure to find the height of the water left in the can and then subtract the number of inches from 10 se a scale to weigh the water left in the can and then subtract the number of pounds from 10 Use a measuring cup to find the amount of water left in the can and then subtract the number of cups from 10