C.S.A of the Cone
The diameters of two cones are equal. If their slant heights are in the ratio 3:4, then find the ratio of their curved surface areas.
3 : 5
5 : 4
2 : 3
3 : 4
The height and radius of cone are 4 cm and 3 cm respectively. Find the curved surface area of cone.
In a birthday, 25 caps are required which are of conical shape. The dimensions of conical cap must be 10 cm (height) and 24 cm (radius). If the material used for making these caps is paper which is in rectangular shape. The length of paper is 24 cm, then the width of paper is ________.
If the area of a rectangle is equal to the curved surface area of the cone, then find the breadth of the rectangle in terms of radius(r), slant height(h) and length (l).
π× radius of base × slant height.
Reason (R): Total surface area of a right circular cylinder is
π×(radius of base)2 + π× radius of base × slant height.
Which of the following is correct?
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true and R is not the correct explanation of A.
- A is true and R is false.
- A is false and R is true.
A right angled triangle having its base and height equal to 24 cm and 7 cm respectively is rotated by 360⁰ along its base. Find the curved surface area of the resultant figure.
- 520 cm2
- 550 cm2
- 450 cm2
- 1460 cm2
- ₹ 770
- ₹ 335
- ₹ 1, 005
- ₹ 370