Q: A truck moving at a speed of 35 km/h covers a distance of 140 km. If the truck covers the next 20 km distance in 30 minutes and the last 30 km distance at a speed of 60 km/h. what is the average speed of the truck (in km/h)?
A.
40
B.
42
C.
48.5
D.
38
Correct Answer:
Option D -
Explanations:
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