Question

A conical tent is 5m high and the radius of the base of 12m find the slant height if the cost of 1m square canvas is rs 70 find thecost of canvas required to make the tent

• A. 34320
• B. 34320
• C. 34321
• D. 34319

Answer 1

The Correct Option is C

Radius of the tent = 12m
Height = 5m
Slant height = √(r²+h²)
\(=\) √(5²+12²)
\(=\) √(25+144)
\(=\) √(169)
\(=\) 13 m
Curved surface area of the tent \(=\) \(\pi\)rl
\(=\) \(\frac{22}{7}\) × 12 × 13 =490.28
\(=\) 490.3 m²
Cost of 1 m² canvas = \(₹\)70
Cost of 490.3 m² canvas = 490.3 ×70
= \(₹\)34321 So the correct option is (C) : .