Selected MCQ

Current Question
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 1
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 2
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.
Related Question 3
Two circles have a radius relation. Area of the square is 196 cm². Find radius.
  • A. 12π
  • B. 16π
  • C. 24π
  • D. 32π
Correct Answer: C
Explanation:
Side=14, radius=7×? → area relation.
Related Question 4
A wire bent into a square encloses 484 cm². If reshaped, find a new area.
  • A. 484 cm²
  • B. 538 2/7 cm²
  • C. 616 cm²
  • D. 644 cm²
Correct Answer: C
Explanation:
Perimeter conserved.
Related Question 5
Volume of cube is 1728 cc. Find surface area.
  • A. 864 cm²
  • B. 648 cm²
  • C. 486 cm²
  • D. 468 cm²
Correct Answer: A
Explanation:
Side = 12 → TSA = 6×144.