The total height of the toy is
110 mm and the height of its conical part is 77 mm. The diameters of the base of the conical
part is 72 mm and that of the cylindrical part is 40 mm.
On the basis of the above information, answer any four of the following questions:
(i) If its cylindrical part is to be painted red, the surface area need to be painted is
(a) 2320π mm (b) (c) (d) 2 1120π mm2 1320π mm2 1720π mm2
Answers
Given : toy is in the shape of a cone mounted on a cylinder.
The total height of the toy is 110 mm and the height of its conical part is 77 mm.
The diameters of the base of the conical part is 72 mm and that of the cylindrical part is 40 mm.
cylindrical part is to be painted red,
To Find : surface area need to be painted is
(a) 2320π mm²
(b) 1120π mm²
(c) 1320π mm²
(d) 1720π mm²
Solution:
Cylinder Surface area to be painter = one base + CSA
cylinder height = 110 - 77 = 33 mm
Diameter of cylinder = 40 mm
=> radius = 20 mm
base area = πr² = π (20)² = 400π mm²
CSA = 2πrh = 2π(20)33 = 1320π mm²
cylindrical part is to be painted red = 400π + 1320π
= 1720π mm²
Learn More:
बवत्तीय बेलन के आधार की त्रिज्या 5 ...
brainly.in/question/13386500
From a solid cylinder of height 24 cm and diameter 10 cm, two ...
brainly.in/question/2705273
The bottom of a right cylindrical shaped vessel made from metallic ...
brainly.in/question/8993181