A conical tent has a base radius of 7 m and a height of 24 m. How many metres of canvas 2 m wide are needed to make its curved surface? Take $\pi = \frac{22}{7}$.

Explanation

1. 01

   Slant height = $\sqrt{7^2 + 24^2} = 25$ m.

2. 02

   Canvas area = $\pi r l = \frac{22}{7} \times 7 \times 25 = 550$ m².

3. 03

   Length of canvas = area ÷ width = $550 \div 2 = 275$ m.