A man walks from point X to Y at a speed of 20 km/h, but comes back from point Y to X at a speed of 25 km/h. Find his average speed.
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e 
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Understanding |
Application |
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Average speed for same distance travelled = (2×Product of both speeds)/(Sum of both speeds) |
Average speed= 2xy/(x+y) =(2×20×25)/(20+25) =(2×20×25)/45 =200/9 =22 (2/9) km/hr |