page 07 MARKS 13. An engineer has designed a lifting device. The handle turns a screw which shortens the horizontal length and increases the vertical height. The device is modelled by a rhombus, with each side 25 cm. The horizontal length is x cm, and the vertical height is h cm as shown. h x 25 cm (a) Show that h x = ā 2 2500 . (b) The horizontal length decreases at a rate of 0Ā·3 cm per second as the handle is turned. Find the rate of change of the vertical height when x = 30. [Turn over 1 5
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This question is part of the UK A-Level Mathematics syllabus. In the actual exam, structured questions typically require linking specific keywords to gain full marks. Applaa helps you drill these topics.
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