so first find the circumference
circumfernece=2 times pi times radius
2 times radius=diameter
diameter=1.5
using associative property of multipication which is a(bc)=(ab)c
so
c=2 times pi times r
c=pi times (2 times r)
c=pi times diameter
c=pi times 1.5
circumference is 1.5pi
multiply by 75
112.5pi is the answer
(pi is aprox 3.14 so 112.5 times 3.14=353.25 meters)
the answer is 112.5π meters or aprox 353.25 meters