Question : What is the diameter (in cm) of a sphere with a surface area of 6.16 sq. cm?
Option 1: 1.4
Option 2: 0.7
Option 3: 2.8
Option 4: 2.1
Answer (1)
25th Jan, 2024
Correct Answer: 1.4
Solution :
Let the radius be $r$.
The total surface area of a sphere = $4\pi r^2$
⇒ $6.16=4\pi r^2$
⇒ $6.16=4×\frac{22}{7}×r^2$
⇒ $r^2=\frac{49}{100}$
$\therefore r=0.7$ cm
Diameter = $2×r=2×0.7=1.4$ cm
Hence, the correct answer is 1.4.
Comments (0)
Related Questions
Know More about
Staff Selection Commission Combined Grad ...
Answer Key | Eligibility | Application | Selection Process | Preparation Tips | Result | Admit Card
Get Updates Brochure
Thank You!
Your Staff Selection Commission Combined Graduate Level Exam brochure has been successfully mailed to your registered email id “”.
Upcoming Exams
Application Date:
17 Nov, 2025
- 14 Dec, 2025
Application Date:
27 Oct, 2025
- 17 Nov, 2025
Exam Date:
19 Nov, 2025
- 24 Nov, 2025
Mains Exam
Admit Card Date:
14 Nov, 2025
- 21 Nov, 2025
Exam Date:
14 Nov, 2025
- 4 Dec, 2025
