6. A pump with D = 500 mm delivers Q = 0.725 eis of water at H =10 m at its best efficiency point. If the specific speed of the pump is 1.74. and the required input power is 90 kW, determine the shut-off head. Ho, and best efficiency, vibe!). If the pump is now run at 900 rpm, by scaling the performance curve, estimate the new flow rate, head, shutoff head, and required power.