Selected MCQ

Current Question
If a triangle has sides 3 cm, 4 cm, and 5 cm, what type of triangle is it?
  • A. Equilateral
  • B. Isosceles
  • C. Right-angled
  • D. Obtuse
Correct Answer: C
Explanation:
3² + 4² = 5².
Related Question 1
If the sides of a triangle are 26 cm, 24 cm, and 10 cm, what is its area?
  • A. 120 cm²
  • B. 130 cm²
  • C. 312 cm²
  • D. 315 cm²
Correct Answer: A
Explanation:
Using Heron’s formula, area = 120 cm².
Related Question 2
Three cubes of sides 9, 12, and 15 cm are melted to form a new cube. Find its side.
  • A. 21 cm
  • B. 19 cm
  • C. 32 cm
  • D. 18 cm
Correct Answer: D
Explanation:
Total volume = cube of new side.
Related Question 3
The perimeters of two squares are 48 cm and 20 cm. Find the difference in their sides.
  • A. 15√2 cm
  • B. 13√2 cm
  • C. 16√2 cm
  • D. 17√2 cm
Correct Answer: B
Explanation:
Side = perimeter/4; difference leads to 13√2 cm.
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
Two people work together. One types 32 pages in 6 hRs. Time to complete 100 pages is ____.
  • A. 7 hr 15 min
  • B. 7 hr 30 min
  • C. 8 hr 15 min
  • D. 8 hr 30 min
Correct Answer: C
Explanation:
The rate method gives 8 hr 15 minutes.