Question

Find the total cost of covering the boundary with tape, if 1 feet of the tape costs $2.

• A. $12
• B. $12.5
• C. $13.5
• D. $14.5

Answer 1

The correct option is B $12.5

Length of tape required = Perimeter of signboard
Perimeter = 3 × Side
= $3\times 25$
= 75 inches

12 inches = 1 feet
75 inches = $75÷12$
= 6 $\frac{3}{12}$

= 6 $\frac{1}{4}$ feet

Cost is 2 dollars for 1 feet.
Total cost = 6$\frac{1}{4}\times 2$

= $\frac{25}{4}\times 2$

= $\frac{25}{2}$

= $\$12.5$