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Unformatted text preview: If the volume of the pillar is 14.2 m 3 , find its height. 6. A circular tank of base radius 2 m is filled with water to a depth of 5.5 m. A metal pillar, 10 m long, with triangular crosssection, is then lowered until it stands upright on the tank’s base as shown in the figure. If the base of the pillar is a rightangled triangle whose perpendicular sides are 1 m and 2 m, find (a) the rise in waterlevel, (b) the total area of the wet surfaces of the pillar. ANSWER 1. (a) 216 (b) 225 2. (a) 6 cm (b) 24 cm 2 (c) 4.8 cm 3. (a) 6 7 4. 21.9 5. (a) 8.49 cm (b) 3400 cm 3 6. (a) 1.83 m 2 (b) 7.77 m 圖 (a) Figure (a) 圖 (b) Figure (b) 8 cm 0.8 m...
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 Winter '11
 fugee
 Orders of magnitude, Mathematics Revision Exercise

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