Sign in
ui-button
ui-button
Topics
General Knowledge
General Science
General English
Aptitude
General Computer Science
General Intellingence and Reasoning
Current Affairs
Exams
Elementary Mathematics
English Literature
Elementary Mathematics
Volume and surface area
What will be the surface area of the sphere having 4 cm radius?
A) 64 \( \Large \pi cm^{2} \)
B) 69 \( \Large \pi cm^{2} \)
C) 32 \( \Large \pi cm^{3} \)
D) 35 \( \Large \pi cm^{3} \)
Correct Answer:
A) 64 \( \Large \pi cm^{2} \)
Description for Correct answer:
Required surface area = \( \Large 4 \pi r^{2} \)
= \( \Large 4 \times \pi \times 4^{2} = 64 \pi sq cm \)
Part of solved Volume and surface area questions and answers :
>> Elementary Mathematics
>> Volume and surface area
Login to Bookmark
Previous Question
Next Question
Report Error
Add Bookmark
View My Bookmarks
Report error with gmail
Hide
Comments
No comments available
Login to post comment
Similar Questions
1). What is the diameter of the largest circle lying on the surface of a Sphere of surface area 616 sq cm?
A). 14 cm
B). 10.5 cm
C). 7 cm
D). 3.5 cm
-- View Answer
2). A sphere and a hemisphere have the same surface area. The ratio of their volumes is
A). \( \Large \frac{\sqrt{3}}{4} : 1 \)
B). \( \Large 3\frac{\sqrt{3}}{4} : 1 \)
C). \( \Large \frac{\sqrt{3}}{8} : 1 \)
D). \( \Large \frac{3\sqrt{3}}{8} : 1 \)
-- View Answer
3). A hemispherical bowl has 3.5 cm radius. It is to he painted inside as well as outside. Find the cost of painting it at the rate of Rs.5 per 10 sq cm.
A). Rs.50
B). Rs.81
C). Rs.56
D). Rs.77
-- View Answer
4). If the surface area of a sphere is 616 sq cm, What is its volume?
A). \( \Large \frac{4312}{3} cm^{3} \)
B). \( \Large \frac{4102}{3} cm^{3} \)
C). \( \Large 1257 cm^{3} \)
D). \( \Large 1023 cm^{3} \)
-- View Answer
5). If the ratio of the diameters of two spheres is 3 : 5, then What is the ratio of their surface areas?
A). 9 : 25
B). 9 : 10
C). 3 : 5
D). 27 : 125
-- View Answer
6). A hemisphere has 28 cm diameter. Find its curved surface area.
A). 1232 sq cm
B). 1236 sq cm
C). 1238 sq cm
D). 1233 sq cm
-- View Answer
7). If the radius of a sphere is increased by 3%, then what per cent increase takes place in surface area of the sphere?
A). 6.09%
B). 7%
C). 5.06%
D). 9%
-- View Answer
8). If radius of a sphere is decreased by 24%, by what per cent does its surface area decrease?
A). 44%
B). 49%
C). 42.24%
D). 46.20%
-- View Answer
9). A prism has the base a right angled triangle whose sides adjacent to the right angle are 10 cm and 12 " cm long. The height of the prism is 20 cm. The dens1t of the material of the prism is 6 g/cu cm. The weight of the prism is
A). 3.4 kg
B). 4.8 kg
C). 6.4 kg
D). 7.2 kg
-- View Answer
10). The base of a right prism is a right angled angled isosceles triangle whose hypotenuse is 'a' cm. If the height of the prism is 'h' cm, then its volume is
A). \( \Large \frac{a^{2}h}{4} cm^{3} \)
B). \( \Large \frac{a^{2}h}{6} cm^{3} \)
C). \( \Large \frac{a^{2}h}{8} cm^{3} \)
D). \( \Large \frac{a^{2}h}{12} cm^{3} \)
-- View Answer