Question

Serena uses chalk to draw a straight line on the sidewalk. The line is 12 ft long. She wants to divide the line into sections that are each 1.8 ft long.How many sections will the line be divided into? 1 decimal place

Answer 1

Solution:

Given that the line drawn is 12 ft long, and each section into which the line is to be divided into, is 1.8ft long.

This implies that

$length\text{ of line = number of sections }\times length\text{ of each section}$

Let x represent the number of sections.

Thus, we have

$12\text{ ft = x}\times1.8ft$

To solve for x, we have

$\begin{gathered} 12=1.8x \\ divide\text{ both sides by the coefficient of x, which is 1.8} \\ \frac{12}{1.8}=\frac{1.8x}{1.8} \\ \Rightarrow x=6.66666 \end{gathered}$

Hence, we have

$6.7\text{ \lparen1 decimal place\rparen}$