Question

Calculate the area of the cone with a diameter of 10 cm and a height of 12cm

Answer 1

Hey there!

s = √(12² + 5²) = 13

Area = πr(r + s)
= 3,14 x 5 (5 + 13)
= 3,14 x 90 
= 282.6 cm²

Answer 2

Diameter = 10 cm
Radius = 10/2 = 5 cm

Height = 12 cm
Slant height = ✓12^2 + 5^2= ✓169 = 13 cm

Area = πr ( l + r)
22/7 x 5 (13 + 5)
= 22/7 x 5 x 18
= 22/7 x 90
= 282.857 cm^2

Hope This Helps You!