measure

[Ju]

I encountered a sentence from a grammer book with the modal answer which I don't understand.

The longer string ______ about two metres.

(multiple choices)

1. measure
2. measures
3. is measured
4. measuring

The modal answer is : (2) measures
My answer is : (3) is measured

Can anyone help?

Thank you.

[SoothingDave]

Measure | Define Measure at Dictionary.com

Note definitions 21 and 31. "Measure" can mean both the act of determining the dimensions of something (I measured the room.) and the fact that something has those specific dimensions (The room measured 8 foot by 12.)

[emsr2d2]

This piece of string is 20 centimetres long.
This piece of string measures 20 centimetres.

If you look at the descriptions of properties for sale in the UK, the estate agents' wordings will give lots of examples of this. The house comprises a living room, measuring 19 ft x 12 ft, a main bedroom measuring 10ft x 10ft, a kitchen measuring 12ft x 8ft and a bathroom measuring 7ft x 5ft.