A cylindrical wastepaper basket with a 0.15-m radius opening is in a uniform electric field of 300 N/C, perpendicular to the opening. The total flux through the sides and bottom is: 0 N⋅m2/C 4.2 N ⋅m2/C 21 N⋅m2/C 280 N⋅m2/C can't tell without knowing the areas of the sides and bottom