Find the surface area of a cone whose base is a circle with a 5 cm radius and whose altitude is 10 cm.

l² = h² + r²

l² = 10² + 5²

l² = 125

l = 5√5

Surface area = πr(r + l)

Area = 22/7 × 5 (5 + 5√5)

Area = 550/7 × (1 + √5)

option 1

data plot with   3 dots over 33, 1 dot over 34, 2 dots over 35, no dot over 36, 1 dot over 37, 2 dots over 38, 4 dots over 39, and 2 dot over 40.

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft