If a body covers 2/5th of the total distance with Vi speed and 3/5th distance with V2, then average speed is
Correct answer: C. C
- A. A
- B. B
- C. C
- D. D
Explanation
C is the correct option. Avg speed= Total distance/ total time Total distance =X Total time;time for V1=2X/5V1 time for V2 = 3 X/ 5V2total time =2X/5V1 + 3 X/ 5V2 =X(2V2 + 3V1)/5V1V2Avg speed = X/X(2V2 + 3V1)/5V1V2 =5V1V2 /2V2 + 3V1 .
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