A) 27 km/h
B) 26 km/h
C) 25 km/h
D) 24 km/h
Correct Answer: D
Solution :
[d] Here, \[x=20\,km/h,\] \[y=30\,km/h\] \[\therefore\] Average speed \[=\frac{2xy}{x+y}\]\[=\frac{2\times 20\times 30}{50}\]\[=24\,\,km/h\] |
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