The radius of the base of a conical tent is 20 feet and the slant height of the cone is 35 feet. Find the area(in square feet) of the canvas that is required for making this tent. Ignore the wastage of canvas (Use $$\pi= \frac{22}{7}$$​)

Correct option is B

Given:

Radius of base of cone = 20 feet

Slant Height of cone =35 feet

Formula Used:

Lateral surface area of cone = $$\pi r l$$​​

Solution:

The area of canvas required is lateral surface area of conical tent

Lateral surface area of cone =$$\pi (20)(35)$$​​

​$$= \frac{22}{7}\times20\times35 =2200\ sq.ft.$$​​