4. Ti e figure shows a closed container of uniform cross- se tion.
Ti e cross-section consists of triangle ABC and a
quarter BCE
of a circle, center C. Given AC = 4 cm, BC = 7 cm and
B] =AG=EF=10cm, Calculate
a. The area of the cross-section ACEB;
b. The volume of the container;

c. The area of the surface BDFE