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The figure below shows a travel graph for a motorist who starts his journey at 12 noon and drives to a town 45 kilometres away.
Use the figure to answer the questions below:
(a) Find the average speed of the motorist:
(i) between 12 noon and 1 pm.
(ii) between 1 p.m and 2 pm.
(iii) between 1 p.m and 3 pm.
(iv) for the whole journey.
(v) for the first 200 kilometres.
(vi) for the last 200 kilometres
(b) Find the distance covered between:
(i) 12 noon and 2 pm.
(ii) 1.30 pm and 3.30 pm.
(c) Between what times was the average speed greatest?