Question

1. calculate what is the volume of a paperback book 21 cm tall, 12 cm wide, and 3.5 cm thick?

Explanation:

Step1: Recall volume formula

The volume $V$ of a rectangular - prism (which a book resembles) is given by $V = l\times w\times h$, where $l$ is length, $w$ is width and $h$ is height.

Step2: Identify the values

Here, $l = 21$ cm, $w = 12$ cm, $h = 3.5$ cm.

Step3: Calculate the volume

$V=21\times12\times3.5$ cm$^3$. First, $21\times12 = 252$. Then, $252\times3.5=882$ cm$^3$.

Answer:

$882$ cm$^3$