2023

Mathematics

POST UTME

Calculate the surface area of a hollow cylinder which is closed at one end. If the base radius is 3.5 cm and the height 8 cm ( $\pi$ $= 22/7$ )

A. 126.5 cm2

B. 165 cm2

C. 176 cm2

D. 214.5 cm2

Correct Answer: 214.5 cm2

Explanation

surface area of a cylinder = $2\pi rh + \pi r^2$
$176 + 38.5 = 214.5cm^2$

surface area of a cylinder = $2\pi rh + \pi r^2$

$176 + 38.5 = 214.5cm^2$

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2023

Mathematics

POST UTME

Calculate the surface area of a hollow cylinder which is closed at one end. If the base radius is 3.5 cm and the height 8 cm (﻿π\piπ﻿ ﻿=22/7= 22/7=22/7﻿ )

A.

126.5 cm2

B.

165 cm2

C.

176 cm2

D.

214.5 cm2

Correct Answer: 214.5 cm2

Explanation

surface area of a cylinder = ﻿2πrh+πr22\pi rh + \pi r^22πrh+πr2﻿ ﻿176+38.5=214.5cm2176 + 38.5 = 214.5cm^2176+38.5=214.5cm2﻿

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Calculate the surface area of a hollow cylinder which is closed at one end. If the base radius is 3.5 cm and the height 8 cm ( $\pi$ $= 22/7$ )

surface area of a cylinder = $2\pi rh + \pi r^2$
$176 + 38.5 = 214.5cm^2$