a cone of height 2.8 cm has a lateral surface area 23.10 cm^2.what is the radius of the base
Answers
Answered by
4
lateral surface area = 23.10 cm²
l = √(h² + r²) = √(7.84 + r²)
lateral surface area = π r l
so
23.10 = 3.14 x r x √(7.84 + r²)
⇒ r x √(7.84 + r²) = 7.35
⇒7.84 + r² = 54.02 /r²
solving r we get
r = 2.1003 cm
l = √(h² + r²) = √(7.84 + r²)
lateral surface area = π r l
so
23.10 = 3.14 x r x √(7.84 + r²)
⇒ r x √(7.84 + r²) = 7.35
⇒7.84 + r² = 54.02 /r²
solving r we get
r = 2.1003 cm
Anonymous:
Thank you
Similar questions