Not sure which exam it is off, but I am looking for help on this question, really unsure. It was apparently on the Higher Calculator paper, god knows what year, sorry, because my teacher only printed the question off. Anyhow, it looks like this...
A circle has an area of 100m2.
Work out the circumference of the circle.
Give your answer correct to 3 significant figures.
There's no diameter or radius, or anything, just a circle drawn. I was trying to find out the diameter of the circle by dividing the area by Pi (3.142) and then square rooting the answer, to give me a diameter, not sure whether that's right? Not sure if it's a hard question, but I found some harder questions easier. Hmm. I'd appreciate some help, tomorrow's the exam, and it would be helpful to know, just in case something like that does come up.