Question

The length of a rectangular notebook is 15 cm and the perimeter is 50 cm. Find the width and area of the notebook.

• A. Width = 15 cm
• B. Width = 10 cm
• C. Area $=150c{m}^2$
• D. Area $=250c{m}^2$

Answer 1

Answer: (B), (C)

The correct options are
B Width = 10 cm
C Area $=150c{m}^2$

Let the breadth of the notebook be $ycm$.
Length = 15 cm (Given)
Perimeter = 50 cm (Given)
Perimeter of the rectangular notebook = Sum of the lengths of its four sides.

$\Rightarrow 50=15+15+y+y$

$\Rightarrow 50=2(15+y)$

$\Rightarrow 25=(15+y)$

$\Rightarrow y=10$

$\therefore$ The width of notebook is $10cm$

Area covered by the notebook $=15cm\times 10cm$
$=150c{m}^2$