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Earlier discussion
2 older comments kept for context.
Oluwaseun Adeyemi
Average speed = \(\frac{\text{total Distance}}{\text{Total Time}}\)
from Calabar to Enugu in time t1, hence
t1 = \(\frac{p}{u}\) also from Enugu to Benin
t2 = \(\frac{q}{w}\)
Average speed = \(\frac{p + q}{t_1 + t_2}\)
= \(\frac{p + q}{\frac{p}{u} + \frac{q}{w}}\)
= p + q × \(\frac{uw}{pw + qu}\)
= \(\frac{uw(p + q)}{pw + qu}\)
Sani Abdulkadir
Final answer =1 because, uw(p+q)/(pw+qu) = uw(p+q)/uw(p+q) =1.