ranti4sure2010
ranti4sure2010 ranti4sure2010
  • 24-02-2020
  • Mathematics
contestada

A solid cylinder of radius 7cm is 10cm long.find it's total surface area
a. 70πcm3
b. 210πcm3
c. 238πcm3
d. 189πcm3​

Respuesta :

PollyP52 PollyP52
  • 24-02-2020

Answer:

C.  238π  cm^3.

Step-by-step explanation:

Surface area = 2 * area of the circular ends + area of the curved length

= 2π r^2 + 2π r* l

= 2 π 7^2 + 2π 7 * 10

= 98π + 140π

= 238π  cm^3.

Answer Link
Onoriodefelix
Onoriodefelix Onoriodefelix
  • 24-02-2020

Answer:

c. 238πcm3

Step-by-step explanation:

Total surface area =

2pirh + 2pir^2

Given radius r = 7cm and

Height h = 10cm

Total surface area = 2 x pi x 7 x 10 + 2 x pi x (7)^2

140pi + 2 x pi x 49

140pi + 98pi

238pi cm^3

Answer Link

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