Read the word problem carefully and solve. 1. An open box is 50 cm long, 25 cm wide and 20 cm high. Find the volume. 2. A family compound has rectangular water tank which measures 7 meters long, 5 meters wide and 4 meters deep. How much water does it hold when full? 3. Cony gave her mother a diamond ring. Since the ring was so expensive, it needs to be placed in a locked jade cubical box with an edge of 8 cm. Find the volume of the jewelry box.​