Formula:
Distance = speed × time
Given
Distance = 225 km
Time = 2.5 hrs
Find speed:
D = s × t
225 = s × 2.5
Divide by 2.5 on either sides to isolate s
\(\frac{225}{2.5}\) = \(\frac{2.5s}{2.5}\)
2.5 and 2.5 cancels out
90 = s
speed = 90 km/hr (as the given were km and hr)
