A) 10.4 km/hr
B) 10.8 km/hr
C) 11.0 km/h
D) 12.2 km/hr
Correct Answer: B
Solution :
Total distance \[=10+12=22\]km Total time \[=\frac{10}{12}+\frac{12}{10}\] \[=\frac{244}{120}\] hours \[\therefore \]Required average speed \[=\frac{Total\,\,dis\tan ce}{Total\,\,Time}\] \[=\frac{22}{\frac{244}{120}}=\frac{22}{244}\times 120=10.8\] Km/hrYou need to login to perform this action.
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