A box with lid is made of 2 cm thick wood. Its external length, breadth and height are 25 cm, 18 cm and 15 cm respectively. How much cubic cm of liquid can be places in it> Also, find the volume of the wood used in it.
Given,
External dimensions of box = 25cm×18cm×15cm
Thickness of wood = 2 cm
So, internal dimensions of box = (25-4) cm×(18-4) cm×(15-4) cm
= 21cm×14cm×11cm
Volume of liquid can place in it = 21 ×14×11 = 3234 cm3
Volume of wood use in it = external volume – internal volume
= 
16