The fan is rated to deliver 600m3/min when running at 350rpm and required 7kw motor to drive it. If the fan speed is changed to 600rpm and the air handled at 55C instead of 28C, find the power in kw.

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Rectangular Coordinate System

In a rectangular coordinate system, each point based on the pair of coordinates is specified uniquely in the plane. From two fixed perpendicular lines, these coordinates are at a distance in the rectangular coordinate system. Each line is known as the reference axis and axes as plural. The point where they meet is called the origin (0,0).