Question

a book is 20cm by 18cm and 50mm thick. how many cubic centimetres of space does the book occupy

Answer 1

first we have to convert 50mm into centimeter
i.e 50mm = 5cm
=> volume = 5×20×18 = 1800 cubic centimeter

Answer 2

length of book = 20cm
width of book=18 cm
thick of book=50mm=5cm
space occupies = length ×breadth×thickness
=20cm × 18cm ×5cm
=100cm sq × 18 cm
= 180cm cube
so,the book occupies 180cm cube of space .