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?Solution
ATQ,
65 × (x + 4) = 468
Or, x + 4 = 7.2
Or, x = 3.2
Therefore, required distance travelled = 50 × 3.2 = 160 km
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