Question

6) A cone of slant height 10cm and the perimeter of it's base is 44cm. then the curved
B)
A) 1450 cm
surface area of the cone is
p) 220 cm 2
C) 44.0 cm2
D) 4400 cm2​

Answer 1

Answer:

curved surface area of cone is 220 cm2

Step-by-step explanation:

Given that,

l= 10 cm

2 pi r = 44 cm

solving this

r= 7 cm

we know that curved surface ara of cone = pi r l

= 22/7*7*10

= 22*10

220 cm2.

Answer 2

$</p><p>\bold{\underline{\sf Given:}} </p><p>\\ </p><p> \sf \rightarrow \quad slant \: height, \: l = 10 \: cm \\</p><p> \sf \rightarrow \quad perimeter \: of \: base, \: P = 44 \: cm \\ \\ </p><p>$

$</p><p>\bold{\underline{\sf To Find:}} </p><p>\\ </p><p> \sf \rightarrow \quad Curved \: surface \: area \: of \: cone \\ \\</p><p>$

$</p><p>\bold{\underline{\sf Solution:}} </p><p>\\ \\</p><p> \sf We \: know ,</p><p>\\ \\ \sf \qquad Perimeter = 2 \pi r \\ \\</p><p> \sf \rightarrow \quad \pi r = \frac{\cancel{44}}{\cancel{2}} \\ \\</p><p> \sf \rightarrow \quad \pi r = 22 \: cm \\ \\</p><p>\sf Also, \\ \\</p><p></p><p>$

$</p><p>\sf \quad C.S.A = \pi r l \\ \\</p><p> \sf \rightarrow \quad 22 \times 10 \\ \\</p><p> \sf \rightarrow \quad 220 \: cm^{2} </p><p>\\ \\</p><p></p><p>\sf Hence, \: Curved \: surface \: area \\ \sf of \: the \: cone \: is \: \bold{\sf 220 \: cm^{2} } </p><p>$