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alexandr402 [8]
3 years ago
7

The diameter of a £1 coin is 22.5 mm. Work out its circumference to the nearest centimetre.Required to answer. Single choice.

Mathematics
1 answer:
Vladimir79 [104]3 years ago
8 0

Answer:

7

Step-by-step explanation:

Circunference:

The circunference of a circle with diameter d is given by:

C = d\pi

The diameter of a £1 coin is 22.5 mm.

Each mm has 0.1 cm, so the diameter, in cm, is of d = 2.25. Then

C = 2.25\pi = 7

The circunference is of 7 centimeters.

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