Selected MCQ

Current Question
The perimeter of a rhombus is 68 cm, and one diagonal is 16 cm. Find its area.
  • A. 260 cm²
  • B. 240 cm²
  • C. 280 cm²
  • D. 220 cm²
Correct Answer: B
Explanation:
Using the diagonal relation and the area formula (A = ½ d₁d₂) yields 240 cm².
Related Question 1
A rhombus has a side of 26 m and a diagonal of 20 m. Find the area.
  • A. 529 m²
  • B. 240 m²
  • C. 260 m²
  • D. 480 m²
Correct Answer: D
Explanation:
Use the diagonal relation.
Related Question 2
A rhombus has an area of 144 sq cm and diagonals in the ratio 1:2. Find the diagonals.
  • A. 24 cm, 48 cm
  • B. 12 cm, 24 cm
  • C. 6√2 cm, 12√2 cm
  • D. 6 cm, 12 cm
Correct Answer: B
Explanation:
Area = (d1 × d2)/2 yields diagonals 12 and 24.
Related Question 3
Sum of length, breadth, and height of a cuboid is 19 cm, and the diagonal is 5.5 cm. Find surface area.
  • A. 125 cm²
  • B. 236 cm²
  • C. 361 cm²
  • D. None
Correct Answer: B
Explanation:
Use the identity relation.
Related Question 4
The perimeter of a triangle is 28 cm, and its inradius is 2.5 cm. Find its area.
  • A. 25 cm²
  • B. 42 cm²
  • C. 49 cm²
  • D. 35 cm²
Correct Answer: D
Explanation:
Area = r × semi-perimeter = 2.5 × 14 = 35 cm².
Related Question 5
Total area of 64 squares is 400 cm². Find the side of the big square.
  • A. 17 cm
  • B. 20 cm
  • C. 23 cm
  • D. 26 cm
Correct Answer: D
Explanation:
Total side calculation.