A vehicle travels half the distance with speed v and the remaining distance with speed 2v. Its average speed is:
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A vehicle travels half the distance with speed v and the remaining distance with speed 2v. Its average speed is:

G1 Physics · Accepted Answer

Step 1: Let total distance be s. Time for first half = (s/2)/v = s/(2v). Time for second half = (s/2)/(2v)=s/(4v). Step 2: Total time =3s/(4v). Step 3: Average speed = s/[3s/(4v)] = 4v/3. Final answer: A.