Question

to= 2hrs
v=50 km/h
s=100km
t=?​

Answer 1

$v = \frac{Δs}{Δt} = \frac{ Δs }{t - to}$

$50 = \frac{100}{t - 2} \\ 50t - 100 = 100 \\ 50t = 100 + 100 \\ 50t = 200$

$t = \frac{200}{50} \\ t = 4h$