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(a) Total distance = Distance Cycled + Distance Walked
Distance = Speed x Time
56 = v + 2(3v)
56 = v + 6v
56 = 7v
v = 8 km/hr
(b) Average speed for the whole journey
=$\frac{Total\;distance}{Total\;time}$
= $\frac{56}{3}$
= 18.67 km/hr
raphael answered the question on February 15, 2017 at 14:27
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