1. The volume of water+the volume of apple = length * width * height (the height is 15cm), and the equation is listed. You can calculate the volume of the apple.

2. Lead block volume =0.6cm, high water volume = bottom area *0.6.

3. The volume of water in the container 10cm deep = the volume of 5 liters of water+the volume of stone.

4.a. How many liters of water can the bathtub hold? The size of the fish tank = length * width * height.

B bottom area of cubic container * water depth = volume of fish tank

Find out the equation relationship in the problem and list the equation solutions. Should I study equations in the fifth grade?