a plumbing firm is required to make a copper cylinder of 155 litres capacity to fit into a smaller than usual airing cupboard in which the diameter of the cylinder must not exceed 425mm. how high will the cylinder need to be?
a plumbing firm is required to make a copper cylinder of 155 litres capacity to fit into a smaller than usual airing cupboard in which the diameter of the cylinder must not exceed 425mm. how high will the cylinder need to be?
For a cylinder:
V = (pi)r^2*h = (pi)(d/2)^2*h = (pi/4)d^2*h
You've got V, you've got a maximum d, so solve for h.