हिंदी

The total surface area of a solid hemisphere of radius r is ________. - Mathematics

Advertisements
Advertisements

प्रश्न

The total surface area of a solid hemisphere of radius r is ________.

विकल्प

  • 47πr2

  • 2πr2

  • `4/3`πr3

  • 3πr2

  • πr2

  • 4πr2

MCQ
रिक्त स्थान भरें

उत्तर

The total surface area of a solid hemisphere of radius r is 3πr2.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
2024-2025 (March) Basic Board Sample Paper

वीडियो ट्यूटोरियलVIEW ALL [3]

संबंधित प्रश्न

If the total surface area of a solid hemisphere is 462 cm2 , find its volume.[Take π=22/7]

 


A hemispherical depression is cut out from one face of a cubical wooden block such that the diameter l of the hemisphere is equal to the edge of the cube. Determine the surface area of the remaining solid.


In Figure 4, 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.\[[Use\pi = 3 . 14]\]


A solid is composed of a cylinder with hemispherical ends. If the length of the whole solid is 108 cm and the diameter of the cylinder is 36 cm, find the cost of polishing the surface at the rate of 7 paise per cm2 .


If r1 and r2 be the radii of two solid metallic spheres and if they are melted into one solid sphere, prove that the radius of the new sphere is \[\left( r_1^3 + r_2^3 \right)^\frac{1}{3}\].


From a cubical piece of wood of side 21 cm, a hemisphere is carved out in such a way that the diameter of the hemisphere is equal to the side of the cubical piece. Find the surface area and volume of the remaining piece.


A solid metallic sphere of diameter 21 cm is melted and recast into a number of smaller cones, each of diameter 3.5 cm and height 3 cm. Find the number of cones so formed.


How many lead shots each 3 mm in diameter can be made from a cuboid of dimensions 9 cm × 11 cm × 12 cm ?


Two cubes each of volume 8 cm³ are joined end to end, then the surface area of the resulting cuboid is ______.


There are two identical solid cubical boxes of side 7 cm. From the top face of the first cube a hemisphere of diameter equal to the side of the cube is scooped out. This hemisphere is inverted and placed on the top of the second cube’s surface to form a dome. Find

  1. the ratio of the total surface area of the two new solids formed
  2. volume of each new solid formed.

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×