Question

You are asked to determine the perimeter of the cover of your textbook. you measure the length as 48.28 cm and the width as 24.83 cm. how many significant figures should you report for the perimeter?

Answer 1

4 significant figures

Answer 2

Step-by-step explanation:

The length of the textbook, l = 48.28 cm

The breadth of the textbook, b = 24.83 cm

The shape of the textbook is a rectangle. The perimeter is equal to the sum of all sides. Mathematically, it is given by :

$p=2(l+b)$

$p=2\times (48.28+24.83)$

p = 146.22 cm

So, the perimeter of the textbook is 146.22 cm. There are 5 significant figures in this number since non zero digits are always significant. Hence, this is the required solution.