Question

A book is 15 centimeters long and 6 centimeters wide. What are the length and width of the book in inches.Round your answer to the nearest hundredth.

Answer 1

Length and width of book is 5.91 inches and 2.36 inches respectively

Solution:

Given that a book is 15 centimeters long and 6 centimeters wide

To find: length and width of book in inches

From given question,

Length of book = 15 cm

Width of book = 6 cm

The conversion factor used is:

1 cm = 0.393701 inches

Therefore, length of book in inches is:

`15 \text{ cm} = 15 * 0.393701 \text{ inches }= 5.905515 \text{ inches }`

Rounding off rules:

First look at the digit to immediate right of rounding off digit

If that digit is less than 5, do not change the rounding digit but drop all digits to the right of it.

If that digit is greater than or equal to five, add one to the rounding digit and drop all digits to the right of it.

On rounding to nearest hundredth, ( two decimal places )

`5.905515 \text{ inches } = 5.91 \text{ inches }`

Width of book in inches:

`6 \text{ cm} = 6 * 0.393701 \text{ inches } = 2.362206 \text{ inches }`

On rounding to nearest hundredth, we get 2.36 inches