A car travels from calabar to Enugu, a distance of P km w...
A car travels from calabar to Enugu, a distance of P km with an average speed of U km per hour and continues to benin, a distance of Q km, with an average speed of Wkm per hour. Find its average speed from Calabar to Benin
(p+q)pw+qu
uw(p+q)pw+qu
uw(p+q)pw
uwpw+qu
Correct answer is B
Average speed = totalDistanceTotalTime
from Calabar to Enugu in time t1, hence
t1 = PU also from Enugu to Benin
t2 qw
Av. speed = p+qt1+t2=p+q∗pu+qw
= p + q x uwpw+qu
= uw(p+q)pw+qu