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

54 kilometers per hour

step-by-step explanation:

according to rules:

1 km = 1000 meter

which means that 1 meter = 1/1000 km

1 hour = 3600 second [ as 1 hour = 60 min = 60 *60 seconds ]

which means that 1 second = 1/3600 hour

therefore, 1 kilometer/hour =

thus to convert 15 meter per second to kilometer per hour, we multiply 15 to 3.6 kilometer/hour.

15 meter/second=   which is the required answer.