Q: Richa travels from A to B at the speed of 15km/h, from B to C at 20 km/h, and from C to D at 30 km/h. If AB = BC = CD, then find the Richa's average speed.
A.
17 km/h
B.
20 km/h
C.
18 km/h
D.
19 km/h
Correct Answer:
Option B -
Explanations:
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