Question

A truck was moving at 50 km/hr and after ‘x’ hours it increased its speed by 15 km/hr. Then, it continued at the new speed for (x + 4) hours. If the distance it covered during this latter journey was 468 km, how much distance did it cover during the first ‘x’ hours?

A 190 km
B 160 km
C 128 km
D 175 km
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