Answer:
[tex]\huge\boxed{\sf v = 45 \ km/hr}[/tex]
Step-by-step explanation:
Distance = S = 162 km
Time = t = 3hr 36/60 min = 3 hr 0.6 hr = 3.6 hr
Average Speed = v = ?
[tex]\displaystyle v = \frac{S}{t}[/tex]
Put the givens in the above formula
[tex]\displaystyle v = \frac{162}{3.6} \\\\v = 45 \ km/hr\\\\\rule[225]{225}{2}[/tex]