What is the diameter (in cm) of a sphere whose surface area is 616 c

Sail E0 Webinar

Question

What is the diameter (in cm) of a sphere whose surface area is 616 ${cm}^{2}$ ?

Options:

A . 28

B . 21

C . 7

D . 14

Answer: Option D
:
D

Surface area of sphere =
$4 π r^{2} = 616 \Rightarrow r^{2} = 616 \times \frac{7}{22} \times \frac{1}{4} \Rightarrow r^{2} = 49 \Rightarrow r = \sqrt{49} \Rightarrow r = 7 cm$

$∴$ The diameter, $D = 2 r = 2 \times 7 = 14 cm$

Was this answer helpful ?

Next Question

Submit Solution

More Questions on This Topic :

Question 1. Metallic spheres of radii 6cm, 8cm and 10cm, respectively are melted to form a single solid sphere. The radius of the....solid sphere. The radius of the resulting sphere(in cm) is ___

Question 2. A bucket is in the form of a frustum of a cone, its depth is 15 cm and the diameters of the top and the bottom are 56 cm....of water can the bucket hold ? (Take π = 227) __

Question 3. There is a coin. Ram attaches a conical attachment to one flat end of coin. The conical attachment has same radius as ....coin. What is the surface area of the combined solid?

Question 4. A tent is in the form of a cylinder of diameter 4.2 m and height 4 m, is surmounted by a cone of equal base and height....of canvas required for making the tent at ₹100 per sq.m.

Question 5. If the radii of the ends of a bucket, 45 cm high, are 28 cm and 7 cm respectively, then the total surface area of the ....respectively, then the total surface area of the bucket is:

Question 6. If Hemakshi reshaped a cone of height h cm and radius of base r cm into a sphere, then, which of the following op....sphere, then, which of the following options is always correct?

Question 7. A cylindrical pipe has inner diameter of 7 cm and water flows through it at the rate of 192.5 litres per minute. Find ....minute. Find the rate of flow in kilometres per hour.

Question 8. A piece of cloth is required to completely cover a solid object. The solid object is composed of a hemisphere and a co....is 1 m, what is the area of cloth required?

Question 9. A road roller was used for levelling a road of width 2 m. It was observed that, the road roller required 25 complete r....respectively, then length of the road is ____. [Take π = 3.14].

Question 10. Ram has a semicircular disc. He rotates it about its diameter by 360 degrees. When he rotates the disc, a volume of air ....name of the object/shape that exactly occupies this volume is ___.

Chapter 1 - GLOBAL STEEL SCENARIO & INDIAN STEEL INDUSTRY Part 1 : (13-04-2024) INDUSTRY AND COMPANY AWARENESS (ICA)

Direction Sense Test Part 1 Reasoning (Hindi)

Chapter 1 - RMHP / OHP / OB & BP Part 1 : (14-02-2024) GPOE

Cube & Cuboid Part 1 Reasoning (Hindi)

Data Interpretation (DI) Basic Concept Reasoning (Hindi)

Counting Figures Part 1 Counting Of Straight Lines Reasoning (Hindi)

Sail E0 free webinar Webinars

Real Numbers Part 7 Class 10 Maths

Real Numbers Part 1 Class 10 Maths

Polynomials Part 1 Class 10 Maths

DSP Combined 1 Free Revision Test SAIL JO E-0

GPOE / GPA Combined 1 Free Revision Test SAIL JO E-0

BSP Plant Specific Review Test SAIL JO E-0

BSL Combined 1 Free Revision Test SAIL JO E-0

GFM Combined 1 Free Revision Test SAIL JO E-0