BellaBel BellaBel

23-02-2017
Mathematics

contestada

Find the surface area of a cone with a radius, r, of 5cm and a slant height, l, of 5cm.

A. 134.4 cm2
B. 140 cm2
C. 157 cm2
D. 163 cm2

Respuesta :

cameronlgill cameronlgill

23-02-2017

the answer is c 157cm2

Answer Link

ChandrikaP ChandrikaP

23-02-2017

A=πr(r+√h^2+r^2)

A=π*5(5+√25+25)
A=π*5(5+√50)
A=189.61cm

sorry u dont have answer in options

are u sure both height and radius=5 cm?

Answer Link

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