The messenger jogged at a speed of 6 mph from her starting point to the delivery location.
Using velocity formula,
v=s/t
Where v= velocity, s= distance, t= times= v*t
Using the distance formula,
s=v*30/60
s=1/2v --- (1)
s= (v-1)*36/60
s=(v-1)*3/5 --- (2)
1/2v=(v-1)*3/5
1/2v=3/5v-3/5
1/2v-3/5v=-3/5
-1/10v=-3/5
v=(-3/5)/(-1/10)
v=-30/-5v
= 6
The speed with which the messenger was going from point A to point B was 6 mph.
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