A) 5 h
B) 1.20 h
C) 1.12 h
D) 6 h
Correct Answer: B
Solution :
| [b] \[\because \]Here x = 2 and \[y=3\] \[\therefore \]Required time\[=\frac{xy}{x+y}=\frac{2\times 3}{2+3}=\frac{6}{5}=1.20\,h\] |
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