Question

The total surface area of a right circular of radius 7cm is 1188cm². Find its height.

Answer 1

Answer:

46.47 cm

Step-by-step explanation:

TSA of cone = pi x r (l + r )

= 22/7 x 7 x (l+7)

= 22l + 154 =1188

= 22l = 1034

= l = 47 cm

this is the slant height of the cone

height of the cone = root l^2 - r^2

height of the cone = root 2209 - 49

height of the cone = 47.756 cm --------------------- Answer

Answer 2

Answer:

46.47 cm

Step-by-step explanation:

TSA of cone = pi x r (l + r )

= 22/7 x 7 x (l+7)

= 22l + 154 =1188

= 22l = 1034

= l = 47cm

this is the slant height of the cone

height of the cone = root l^2 - r^2

height of the cone = root 2209 - 49

height of the cone = 47.756 cm