Quantitative Aptitude Ques 1277
Question: A solid sphere is cut into two equal halves. What is the ratio of the total surface area of each hemisphere that of the solid sphere?
Options:
A) 2 : 3
B) 3 : 4
C) 1 : 2
D) 4 : 5
Show Answer
Answer:
Correct Answer: B
Solution:
- If a solid sphere is cut into two equals halves, then its halves will became hemisphere.
The total surface area of a hemisphere $ =3\pi r^{2} $
Total surface area of a sphere $ =4\pi r^{2} $
Required ratio $ =3\pi r^{2}:4\pi r^{2}=3:4 $