# A cylinder

A cylinder 108 cm high has a circumference of 24 cm. A string makes exactly six complete turns around the cylinder while its two ends touch the top and bottom. (forming a spiral around the cylinder).

How long is the string in cm?

How long is the string in cm?

## Correct answer:

**Showing 2 comments:**

**Dr Math**

Finding the length of the string is the same as finding the length of the hypotenuse of a triangle with a height of 48 cm and a base of a number of turns*circumference

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### You need to know the following knowledge to solve this word math problem:

**algebra**- expression of a variable from the formula
**solid geometry**- cylinder
**planimetrics**- Pythagorean theorem
- right triangle
- circle
- perimeter
**basic functions**- reason

### Units of physical quantities:

### Grade of the word problem:

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