Question

A bookcase has 5 of these bookshelves that are 42 inches long. How many FEET of shelf space is there? Explain your reasoning. (If the answer is given in inches you can only get a 4 out of 6 maximum. How many FEET of shelf space is the answer you explain.) *

Answer 1

`17.5\ \text{feet}`

Explanation:

A bookcase has 5 bookshelves. Each bookshelf is 42 inches long.

Total bookshelf length in the book case =
`5* 42=210\ \text{inches}`

`1\ \text{feet}=12\ \text{inches}\\\Rightarrow 1\ \text{inch}=(1)/(12)\ \text{feet}`

`210\ \text{feet}=210* (1)/(12)=17.5\ \text{feet}`

The bookcase has a total shelf space of
`17.5\ \text{feet}`.

*One bookshelf has a space of
`(42)/(12)=3.5\ \text{feet}`.