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(a) How long at Bigby?. 36 mins. (b) How far is it from Bigby to Catby. 12 miles. (c) Average speed from Bigby to Catby?. S = d/t = 12/0.4 = 30 mph. (d) Average speed on return journey?. S = d/t = 20/0.8 = 25 mph. (e) Average speed for whole journey?. S = d/t = 40/3 = 13 and 1/3 mph
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