Question : The total surface area of a hemisphere is 462 cm2. The diameter of this hemisphere is:
Option 1: 28 cm
Option 2: 21 cm
Option 3: 7 cm
Option 4: 14 cm
Answer (1)
20th Jan, 2024
Correct Answer: 14 cm
Solution :
Here, the total surface area of a hemisphere = 462 cm
2
⇒ $3\pi r^2 = 462$
⇒ $ 3 \times \frac{22}{7} \times r^2= 462$
⇒ $r^2= 49$
⇒ $ r = 7$ cm
$\therefore$ Diameter of the hemisphere $= 2r = 2 \times 7 = 14$ cm
Hence, the correct answer is 14 cm.
Comments (0)
Related Questions
Know More about
Staff Selection Commission Sub Inspector ...
Result | Eligibility | Application | Selection Process | Cutoff | Admit Card | Preparation Tips
Get Updates Brochure
Thank You!
Your Staff Selection Commission Sub Inspector Exam brochure has been successfully mailed to your registered email id “”.
Upcoming Exams
Mains Exam
Admit Card Date:
23 Nov, 2024
- 30 Nov, 2024
Admit Card Date:
18 Nov, 2024
- 1 Dec, 2024
Application Date:
1 Dec, 2024
Exam Date:
1 Dec, 2024
- 1 Dec, 2024
Application Date:
1 Aug, 2024
- 2 Dec, 2024
