The base of a conical tent is 12m in diameter and the height of i ts vertex is 3.2 m. The area of the canvas required to put up such a tent (in m²) is nearly? (take = 22/7 )
(a) 122.11
(b) 128.22
(c) 132.33
(d) 142.44
Sol:
Triplet (8, 15, 17)
(32, 60, 68)
(3.2, 6, 6.8)
Curved surface area =22/7 × 6 × 6.8
= 128.22 cm²
