Advertisements
Advertisements
प्रश्न
Find the volume and the surface area of the spheres in the following :
Diameter= 6.3 cm
उत्तर
Diameter= 6.3 cm
Diameter = 6.3 cm ⇒ radius (r) = 3.15 cm
Volume of sphere = `4/3pir^3`
= `4/3 xx 22/7 xx 3.15 xx 3.15 xx 3.15`
= 130.98 cm3
Surface area = `4pir^2`
= `4 xx 22/7 xx 3.15 xx 3.15`
= 124.74 cm2
Volume= 130.98 cm3 and Surface area = 124.74 cm2
APPEARS IN
संबंधित प्रश्न
The perimeter of a sector of a circle of radius 5.2 cm is 16.4 cm. Find the area of the sector.
In the given figure, ∆ ABC is a right-angled triangle in which ∠ A is 90°. Semicircles are drawn on AB, AC and BC as diameters. Find the area of the shaded region
Find the circumference and area of circle of radius 4.2 cm
A rectangular piece is 20m long and 15m wide from its four corners, quadrants of 3.5m radius have been cut. Find the area of remaining part.
The radius of a sector of a circle is 7 cm. If the measure of the arc of the sector is 210°, find the area of the sector in case.
In the given figure, ABCD is a square of side 4 cm. A quadrant of a circle of radius 1 cm is drawn at each vertex of the square and a circle of diameter 2 cm is also drawn. Find the area of the shaded region. [π = 3.14]
In the given figure, ABCD is a trapezium of area 24.5 cm2 , If AD || BC, ∠DAB = 90°, AD = 10 cm, BC = 4 cm and ABE is quadrant of a circle, then find the area of the shaded region.
In the given figure, from a rectangular region ABCD with AB = 20 cm, a right triangle AED with AE = 9 cm and DE = 12 cm, is cut off. On the other end, taking BC as diameter, a semicircle is added on outside' the region. Find the area of the shaded region. [Use π = 3.14]
Find the circumference of the circle whose area is 25 times the area of the circle with radius 7 cm.
The speed of the car is 66 km/hour. If each wheel of the car is 140 cm in diameter, find the number of revolutions made by each wheel per minute.
Find the volume and the surface area of the spheres in the following :
Radius = 7 cm
Find the diameter of the sphere for the following :
Volume = `523 17/21` cm3
Find the diameter of the sphere for the following :
Volume = `72pi "cm"^3`
A metal wire, when bent in the form of an equilateral triangle of largest area, encloses an area of 484 `sqrt3` cm2. If the same wire is bent into the form of a circle of largest area, find the area of this circle.
The circumference of a circular field is 308 m. Find is:
(i) Radius
(ii) Area.
The radii of two circles are 48 cm and 13 cm. Find the area of the circle which has its circumference equal to the difference of the circumferences of the given two circles.
In the given figure, the area of the shaded portion is 770 cm2. If the circumference of the outer circle is 132 cm, find the width of the shaded portion.
The circumference of a circle is equal to the perimeter of a square. The area of the square is 484 sq.m. Find the area of the circle.
Sudhanshu divides a circular disc of radius 7 cm in two equal parts. What is the perimeter of each semicircular shape disc? (Use π = `22/7`)
If the circumference of a circle is 352 metres, then its area in square metres is ____________.
