(Solved): The figure below shows the cross section of a ducting (all dimensions in mm ). Throughout the ducti ...

The figure below shows the cross section of a ducting (all dimensions in $\mathrm{mm}$ ). Throughout the ducting are two (2) circular pipes. Glycerine at $25^{?}\mathrm{C}$ flows around the pipes in the unshaded area. Water flows in the pipes. Compute the volume flow rate in ${\mathrm{m}}^3/\mathrm{s}$ of the glycerine that will produce a Reynold's number of 1500 .