Bissoy.com
Doctors Medicines MCQs Q&A

A hemispherical bowl is made of steel, 1 cm thick. The inner radius of the bowl is 4 cm. What will be the outer curved surface area (in sq. cm) of this bowl?

A hemispherical bowl is made of steel, 1 cm thick. The inner radius of the bowl is 4 cm. What will be the outer curved surface area (in sq. cm) of this bowl? Correct Answer 157.14

Given, Inner radius = 4 cm According to the question, Outer radius = 5 cm Curved surface area = 2 πr2 = 2 * (22 / 7) * (5)2 = 157.14 cm2

Related Questions

“What is the different between height and radius of solid cylinder?” Which of the following option is sufficient alone to find the answer? A) A solid cylinder is made by melting a solid sphere. The radius of cylinder is 3 times the radius of a circle whose area is 154 sq.m. Height of cylinder is equal to the height of cone whose volume is 2772 cubic meters. B) Area of a rectangle whose longer side is ¾ times the radius of a solid cylinder, is 168 sq.m and, Volume of solid cylinder is 2772 cubic meters and its height is 18 m. C) A metallic cone of radius 15m and height 35m is melted into the solid cylinder of radius equal to the radius of a circle whose area is equal to the area of rectangle whose sides are in the ratio 4 : 3 respectively. D) The curved surface area of the solid cylinder is 3 time the surface area of a sphere of radius 7m and height of cylinder is equal to the height of a metallic cone whose curved surface area is 308 sq.m. 
A metallic hemispherical bowl is made up of steel. The total steel used in making the bowl is 342π cm3. The bowl can hold 144π cm3 water. What is the thickness (in cm) of bowl and the curved surface area (in cm2) of outer side?
In this question two quantities are given. Find and compare them and choose the appropriate options. A cylinder of radius R and height H has the same volume as that of a sphere of radius r. The surface area of sphere is more than the curved surface area of cylinder. Quantity I: x, where 9x – 2 = 0 Quantity II: R/H; where a cylinder of radius R and height H has the same volume as that of a sphere of radius r. The surface area of sphere is more than the curved surface area of cylinder.
A hollow hemispherical bowl is made of silver with its outer radius 8 cm and inner radius 4 cm respectively. The bowl is melted to form a solid right circular cone of radius 8 cm. The height of the cone formed is
A hollow cylinder is made up of metal. The difference between the outer and the inner curved surface area of this cylinder is 352 cm2. The height of the cylinder is 28 cm. If the total surface area of this hollow cylinder is 2640 cm2, then what are the inner and outer radii (in cm)?
Which of the following statements is/are true? A: If radius of a cylinder is decreased by 50% and its volume remains same, then its height will be increased by 200%. B: Difference between the curved surface area and total surface area of a cone is equal to the area of its circular base. C: If height of a cylinder is equal to its radius, then its curved surface area will be equal to the total area of its both the circular bases.
Consider the following statements regarding the cylinder and the hemispherical solid? I. If the height of a cylinder is tripled, curved surface area becomes eight times. II. If the radius of a hemispherical solid is doubled, its total surface area becomes four times.
A hemispherical bowl with outer and inner radius, 14 cm and 7 cm respectively, is fully filled with Alcohol. When this alcohol is poured into a conical container of radius 3.5 cm and height 21 cm, then how much alcohol will be left in that bowl after pouring (if any). 
A hemispherical cup of inner radius 3 cm is filled with water. The water is poured into another hemispherical cup of inner radius 6 cm. what percentage of the cup will remain empty?
A toy has a cone mounted on a hemispherical base. The radius of hemisphere is 21 cm and height of the toy is 63 cm. What is the ratio of curved surface area of cone to that of the curved surface area of hemisphere?