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The external and internal diameters o...

The external and internal diameters of a hemispherical bowl are 10 cm and 8 cm respectively. What is the total surface area of the bowl? (a) 257.7 cm2     (b) 286 cm2     (c) 292 cm2     (d) 302 cm2

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The external and internal diameters of a hemispherical bowl are 10cm and 8cm respectively.What is the total surface area of the bowl? (a) 257.7cm2 (b) 286cm2 (c) 292cm2 (d) 302cm2

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