Question:
Town A and Town B were 389 km apart. At 11.15 p.m., Gary left for Town B from Town A travelling at an average speed of 76 km/h. He travelled at this speed for 2h 45 min before increasing his speed by 4 km/h for the rest of the journey.
(a) What was the time taken by Gary for the rest of the journey after he increased his speed? Give your answer in hours.
(b) What was his average speed for the whole journey from Town A to Town B?
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