A) 4
B) 5
C) 6
D) 10
Correct Answer: D
Solution :
\[\overset{\mathbf{Person}}{\mathop{{}_{7}^{5}\mathop{\uparrow }_{{}}^{{}}}}\,\] \[\overset{\mathbf{Days}}{\mathop{{}_{4}^{8}\mathop{\uparrow }_{{}}^{{}}}}\,\] \[\overset{\mathbf{Hours}}{\mathop{{}_{x}^{7}\mathop{\downarrow }_{{}}^{{}}}}\,\] \[\therefore \] \[\left. \begin{align} & 7:5 \\ & 4:8 \\ \end{align} \right\}:\,\,:7:x\] \[\Rightarrow \] \[x=\frac{7\times 5\times 8}{7\times 4}=10\]You need to login to perform this action.
You will be redirected in
3 sec