A) 42
B) 40
C) 35
D) 45
Correct Answer: B
Solution :
[b] Total distance = 100 km. Total time\[=\frac{50}{50}+\frac{40}{40}+\frac{10}{20}=1+1+\frac{1}{2}=\frac{5}{2}\,\,hour\] Average speed\[=\frac{200\times 2}{5}=40\,\,kmph\]You need to login to perform this action.
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