A water tank is 5m tall and has a diameter of 3,5m .calculate the capacity (volume) of the tank

Answer 1

r = 3,5/2
Now recall that
v = π r^2 h

Answer 2

The owner of a large electronic storage building wants to install air conditioning with the dimensions of the building. The diagram is not drawn to scale. Note :it consists out of a rectangular prism and a triangular prism. Calculate the volume of the building

Answer 3

split it up into figures you know how to handle. Then add them up.