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7 February, 15:44

Austin keeps a right conical basin for the birds in his garden as represented in the diagram. The basin is 40 centimeters deep, and the angle between the sloping sides is 77°. What is the shortest distance between the tip of the cone and its rim?

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  1. 7 February, 15:51
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    Using trigonometry of right angled triangle:-

    cos 38.5 = 40 / x where x is the shortest distance between tip and rim

    x = 40 / cos 38.5

    = 51.1 cm to nearest tenth
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