The diagram shows a cylindrical tanks. the radius is 30 cm and the height is 80 cm.

a) calculate the area of the base tanks

b) calculate the volume of the tanks in litres​

The 7th grade has collected $200 for a field trip that would cost $600. the teachers decided to ask $50 from additional students to cover the cost. how mny students must pay to cover the cost ? a 16studentsb 80studentsc 160studentsd 8students show work