Distance traveled is directly proportional to time traveled.
d α t
d = kt, where k is constant of proportionality.
Using d = 93 miles and t = 15 hours
93 = k(15)
15k = 93
k = 93/15 = 6.2
Hence variation equation is: d = kt, since k = 6.2.
d = 6.2t
Distance traveled in 24 hours:
d = 6.2t
d = 6.2*24
d = 148.8
Distance traveled is 148.8 miles.