The cost of decorating the curved surface area of a cone is Rs. 6,270. If its base diameter is 42 cm and slant height is 19 cm, then what is the per cm2 cost (in Rs.) of decoration? (Use = 22/7)
Given:
Cost of decoration = ₹6270
Diameter = 42 cm
Radius (r) = 21 cm
Slant height (l) = 19 cm
Formula Used:
Curved Surface Area of cone = π × r × l
Cost per cm² = Total cost ÷ Curved Surface Area
Solution:
CSA =× 21 × 19 = 22 × 3 × 19 = 1254 cm²
Cost per cm² = 6270 ÷ 1254 = ₹5
The cost per cm² of decoration is ₹5.
English
100 Questions
100 Marks
90 Mins English English100 Questions100 Marks90 Mins English English100 Questions100 Marks90 Mins EnglishThe cost of polishing the total surface area of a solid cone at ₹ 0.50 per cm² is ₹ 5632, and the circumference of its base is 176 cm. What is the height of the cone? (Use π = 22/7)
The radius of a right circular cone is 3.5 cm and slant height is 0.21 m, then what is its lateral surface area? (use π = 22/7)
Find the curved surface area of cone whose height is 3 m and radius is 4 m.
(approximate value) (The value of π = )
Find the volume of cone which has base radius as 7 cm and height as 12 cm. (The value of π is )
If the volume of a right circular cone of height 30 cm is 160π , find the diameter of its base.
A conical vessel has base radius 31 cm and height 45 cm. Water is poured into the vessel until it is full. Find the volume (in cm³) of water in the vessel.
The curved surface area of a right circular cone is 5400π cm², and the diameter of its base is 144 cm. Find the height (in cm) of the cone.
The curved surface area of a right circular cone is 6500π cm², and the diameter of its base is 100 cm. Find the height (in cm) of the cone.
Suggested Test Series
Suggested Test Series
