Question

What will be the length of the thread which will be able to cover the given shape perfectly?

• A. 0.52 cm
• B. 52 cm
• C. 5.2 cm
• D. 5.3 cm

Answer 1

The correct option is C 5.2 cm


Perimeter is the length of the boundary of the given figure.
$\Rightarrow$ Perimeter of the given land
= AB + BC + CD + DE + EF + FA

From the figure:
CD = 12 mm - 5 cm = 7 mm
DE = 14 mm - 6 mm = 8 mm

Now perimeter of the given land
= 12 + 5+ 6 + 8 + 7 + 14
= 52 mm

We know that,
1 cm = 10 mm
1 mm = $\frac{1}{10}$ of a cm.

52 mm = 50 mm + 2 mm
= 5 cm + $\frac{2}{10}$cm
= 5.2 cm

Length of the thread = Perimeter of the given shape
= 5.2 cm