Question

Cristina uses a ruler to measure the length of her textbook she says that the book is 4/10 long is her measurement in simplest form if not what is the length of her textbook

Answer 1

Cristina can simplest form it again by 2. So it's 2/5 long.

Answer 2

Actual length of textbook is
`(2)/(5)` long

Explanation:

Given : Cristina measure the length of her textbook and says it is
`(4)/(10)` long

To find : Is her measurement in simplest form if not what is the length of her textbook

Solution : Her measurement is not in the simplest form because a fraction is said to be in simplest form if the numerator and denominator were not having a common factors or relatively prime.

In the given case 4 and 10 were having factors 4=2×2 and 10=2×5 → 2 is the common factor

Therefore,
`(4)/(10)=(2*2)/(2*5)=(2)/(5)`

Actual length of textbook is
`(2)/(5)` long.