Question

. If a car travels at an average speed of 64 km/h, how long
did it take to cover 128 km of distance?
a. 100 minutes
b. 120 minutes
c. 140 minutes
d. 160 minutes ?

Answer 1

120 Min.

$S = S_0+vt\\\\128km = 64km + 64km/h\cdot t\\\\128km - 64km = 64km/h\cdot t\\\\64km = 64km/h\cdot t\\\\t = \frac{64km}{64km/h}\\\\t = 1h \Rightarrow 120min$