Answered

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A cylinder has a surface area of about 221.1 square meters and a height of
7.8 meters. What is the approximate radius of the cylinder?
OA. 3.2 meters
OB. 4.5 meters
OC. 2.1 meters
OD. 6.4 meters

A Cylinder Has A Surface Area Of About 2211 Square Meters And A Height Of 78 Meters What Is The Approximate Radius Of The Cylinder OA 32 Meters OB 45 Meters OC class=

Sagot :

abidemiokin

The approximate radius of the cylinder  is 4.5m

Surface area of cylinder

The formula for calculating the surface area of cylinder is expressed as:

SA = 2πr(r+h)

where

r is the radius

h is the height

Given the following parameters

SA = 221.1 square meters

height = 7.8m

Substitute

221.1= 2(3.14)r(r+7.8)

221.1 = 6.28r^2 + 15.6r

Factorize to have

6.28r^2 + 15.6r - 221.6 = 0

On factoring, the value of the radius is 4.5 meters

Learn more on surface area of cylinder here: https://brainly.com/question/76387

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