1.

A truck driver travels half the distance of his run at one velocity (v) and then completes his run at one half his original velocity (\/2v). What was the trucker's average speed for the trip?A. 0.85VB. 0.80C. 0.75vD. 0.70v (E) 0.65v​

Answer»

Let the TOTAL DISTANCE be 2D so to cover the first half driver would have taken TIME = Distance/speed= D/vsimilarly time taken in second half=D/V2vnow average speed for the trip total travelled distance/total time taken= 2D/(D/V+D/V2v)=0.85V since there is only ONE option in term of V.Hence choice A.0.85 V is the answer



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