A) 40 km/h
B) 80 km/h
C) 46 2 km/h
D) 36 km/h
Correct Answer: D
Solution :
Let total distance \[=x\] Average speed \[=\frac{\text{total}\,\text{distance}}{\text{total time}}\] \[=\frac{x}{\frac{x}{3\times 20}+\frac{2x}{3\times 60}}\] \[=\frac{180\times x}{5x}=36km/h\]You need to login to perform this action.
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