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The base of a conical tent is 19.2 metres in diameter and the height of its vertex is 2.8 metres. The area of the canvas required to put up such a tent (in square metres) (taking π = 22/7) is nearly.
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- 3017.1
- 3170
- 301.7
- 30.17
- 3017.1
Correct Option: C
Radius of base (r) = 19.2 ÷ 2 = 9.6 m Height (h)
= 2.8 m Slant height
l = √r² + h²
= √(9.6)² + (2.8)² = √92.16 + 7.84
= √100 = 10 m
∴ Required area = curved surface area = πrl
| = | × 9.6 × 10sq.m | |
| 7 |
= 301.7 sq.m.
