The circumference of a circle it Pi times the diameter. The diameter is 2 times the radius. So the diameter is 135 and Pi is 3.1416. So the circumference is 424.115 metres.
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If the length is 45 metres and the width is 15 metres, then the area is equal to 45 x 15 = 675 square metres. Don't forget that this is a measure of area, and thus the relevant measure is square metres, not just metres.
Answer: 675 m² = 0.166796 acres
675 square feet a square yard is 3 feet by 3 feet=9 square feet 75x9=675
It's the purity. These markings correspond to different purities in gold, silver and platinum. 675 is 16 karat Gold.
675 square feet. Multiply length by width - the result is the area in square feet.