The intercepted areas between the output torque curve and the mean resistance line of a turning moment diagram for a multicylinder engine, taken in order from one end are as follows: - 35, +410,- 285, +325,-335, + 260,-365, +285,- 260 mm. The diagram has been drawn to a scale of I mm 70 N-m and I mm= 4.5. The engine speed is 900 rp.m. and the fluctuation in speed is not to exceed 2% of the mean speed. Find the mass and cross-section of the flywheel rim having 650 mm mean diameter. The density of the material of the flywheel may be taken as 7200 kg / m'. The rim is rectangular with the width 2 times the thickness. Neglect effect of arms, etc. (CLO 2, PLO 2)