alleryA rectangle of length a and width b has perimeter:
A2(a - b)
B4(a + b)
Ca x b now
D2(a + b)
Answer & Solution
Correct answer: D. 2(a + b)
1. A rectangle has two lengths and two widths.
2. Adding them gives a + b + a + b.
3. So the perimeter is 2(a + b) units.
4. The answer is 2(a + b).
_Source: syllabus Mathematics, Ch 6 'Measuring Space: Perimeter and Area'_
Keep practising Mensuration: Perimeter and Area
Browse all Mensuration: Perimeter and Area questions for CBSE Class 9, or explore more Mathematics topics.
Related questions
Match Heron's formula components for triangle area:Match each hemisphere surface area component (radius r):Match each circular solid with its volume formula:Match each circular 3D solid with its curved surface area (CSA) formula:Spot the one that does not fitFill the gaps on surface areasFind a cone's curved surfacePart of a cone or a sphere