70 km/h car ekata V^2 = U^2 + 2as dammama
u = 70
v = 0
a and s not known
0 = 70^2 - 2as
100 km/h car ekata V^2 = U^2 + 2as dammama
u = 100
v, a and s not known
v = 100^2 - 2as
since a and s for both the cars are equal as given in the question substituting as = 70^2 gives
v = 100^2 - 70^2
v =...