a) Total distance
= Distance walked + distance cycled
D = S x T
56 = v + 2 (3v)
56 = v + 6v; 56 = 7v
v = 8 km/h
b) Average speed for the whole journey
= $\frac{Total distance}{total time}$
= $\frac{56}{3}$ = 18.67 km/hr
johnmulu answered the question on March 2, 2017 at 08:42
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