Surface area of a cylinder

Difficulty Starter · Set 8bkdfe

Take π as 3.14 and give the answer to two decimal places.

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1
A closed cylinder has radius 2 mm and height 4 mm. What is its surface area, in square mm?
2
A closed cylinder has radius 3 mm and height 2 mm. What is its surface area, in square mm?
3
A closed cylinder has radius 2 cm and height 2 cm. What is its surface area, in square cm?
4
A closed cylinder has radius 3 m and height 2 m. What is its surface area, in square m?
5
A closed cylinder has radius 2 m and height 2 m. What is its surface area, in square m?
6
A closed cylinder has radius 2 cm and height 6 cm. What is its surface area, in square cm?
7
A closed cylinder has radius 2 m and height 6 m. What is its surface area, in square m?
8
A closed cylinder has radius 3 mm and height 5 mm. What is its surface area, in square mm?
9
A closed cylinder has radius 2 m and height 3 m. What is its surface area, in square m?
10
A closed cylinder has radius 3 m and height 4 m. What is its surface area, in square m?
11
A closed cylinder has radius 2 m and height 2 m. What is its surface area, in square m?
12
A closed cylinder has radius 2 mm and height 5 mm. What is its surface area, in square mm?
13
A closed cylinder has radius 2 m and height 3 m. What is its surface area, in square m?
14
A closed cylinder has radius 2 m and height 4 m. What is its surface area, in square m?
15
A closed cylinder has radius 2 m and height 6 m. What is its surface area, in square m?
16
A closed cylinder has radius 3 cm and height 4 cm. What is its surface area, in square cm?
17
A closed cylinder has radius 2 cm and height 3 cm. What is its surface area, in square cm?
18
A closed cylinder has radius 3 m and height 5 m. What is its surface area, in square m?
19
A closed cylinder has radius 2 mm and height 2 mm. What is its surface area, in square mm?
20
A closed cylinder has radius 3 mm and height 6 mm. What is its surface area, in square mm?

What is in this set

The numbers in this set run from 2 to 6.
A careful solution takes 4 written steps on average.
The mistake this set invites most often, in 100% of the problems: only the curved side was counted; a closed cylinder has a circle at each end as well.
Answers are a decimal.

Drawing 240 problems from this page produced 30 different ones, 13% — so a sheet of 20 will come back to a problem you have seen — there are only so many sensible ones of this kind.

The same skill, harder or easier

We would put this in front of a grade 8 class. That is our judgement, not a standard, and it is printed here so you can disagree with it. Everything else we put in that year.