a) application of the formula for volume of cylinder. Opportunity to lose 3 marks by not spotting that the diameter is given rather than the radius!
b) note that the circumference of a wheel is the same as the distance it travels in one revolution. (think of an opisometer or trundle-wheel.)
c) note that you should answer the whole question without setting π = 3.14 or 22/7. In part (i) your answer will be in terms of π (e.g. 32πm²) In part (ii) the πs will cancel.
This is a one-page overview of the main points you need to know for this topic.
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