Question

Find the estimated length of the duster if the length of each piece of chalk is $2$ inches.

• A. $6$ inches
• B. $7$ inches
• C. $10$ inches
• D. $5$ inches

Answer 1

The correct option is B $7$ inches

• We can observe that the length of the gap between the first and the second chalk is almost half the length of each chalk.
• So, the length of the gap will be half of $2$ inches $=$ 1 inch
• Length of $3$ chalks $=2+2+2=6$ inches
• The length of the duster $=$ Length of $3$ chalks $+$ Length of the gap between the first and the second chalks
• So, the length of the duster $\text{= 6 inches + 1 inch = 7 inches}$