Question
The length of a rectangular notebook is 15 cm and the perimeter is 50 cm. Find the width and area of the notebook. [2 MARKS]
Answer: Option A
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Steps: 1 Mark
Answer: 1 Mark
Let the breadth of the notebook be y cm
Length = 15 cm (Given)
Perimeter = 50 cm (Given)
Perimeter of the rectangular notebook = Sum of the lengths of its four sides.
⇒50=15+15+y+y
⇒50=2(15+y)
⇒25=(15+y)
⇒y=10
∴ The width of notebook is 10cm
Area covered by the notebook
=15cm×10cm
=150cm2
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