Area of a parallelogram — Mensuration Aptitude Question
Area of a parallelogram: What is the area of a parallelogram with base 18 cm and height 9 cm? Answer and worked solution on CodeKairo.
- Topic: Mensuration
- Section: Quantitative Aptitude
- Difficulty: Easy
- Time target: 40 seconds
Question
What is the area of a parallelogram with base 18 cm and height 9 cm?
Options
- 81 cm²
- 144 cm²
- 162 cm²
- 324 cm²
Show the answer and the worked solution
Correct answer: C. 162 cm²
Worked solution
- Area = 18 × 9 = 162 cm².
Answer: 162 cm².
The idea
A parallelogram is base × perpendicular height, not base × side. A triangle on the same base and height is half of it.
Shortcut. Base × height with no halving: 18 × 9 = 2 × 81 = 162.
Common trap. 81 cm² — halving as for a triangle; a parallelogram is two such triangles, so base × height in full.