A) 10 h
B) 9 h
C) 12 h
D) 8 h
Correct Answer: A
Solution :
\[\Rightarrow \left. \begin{align} & 7:5 \\ & 4:8 \\ \end{align} \right\}::7:x\] \[\therefore \]\[x=\frac{5\times 8\times 7}{7\times 4}=10\,\,h\]You need to login to perform this action.
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