Question

A math book is 3.78 centimeters thick. What is the total width of 21 math books on a shelf? 7178 centimeters

Answer 1

If the math book is 3.78 centimeter thick, then the total width of 21 maths books on shelf can be obtained by simply multiplying 3.78 by 21

That is;

Total width = 3.78 cm x 21 =79.38 cm