a cylindrical pillar of height 7.5m and diameter 3.5m is to be painted. at the top and the bottom, 25cm of the pillar is covered by bras plate and the remaining portion is to be painted . find the area of the pillar which is to be painted

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Solution

50 cm(0.5 m) should not be painted(25 in top and 25 in bottom)
height to be painted = 7.5 -0.5 = 7 m
radius = 3.5/2 = 1.75 m

Area to be painted = curved surface area excluding 0.5 m
= 2 * 3.14 * 1.75 * 7
= 76.93 m.sq.

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a cylindrical pillar of height 7.5m and diameter 3.5m is to be painted. at the top and the bottom, 25cm of the pillar is covered by bras plate and the remaining portion is to be painted . find the area of the pillar which is to be painted

50 cm(0.5 m) should not be painted(25 in top and 25 in bottom) height to be painted = 7.5 -0.5 = 7 m radius = 3.5/2 = 1.75 m Area to be painted = curved surface area excluding 0.5 m = 2 * 3.14 * 1.75 * 7 = 76.93 m.sq.

50 cm(0.5 m) should not be painted(25 in top and 25 in bottom)
height to be painted = 7.5 -0.5 = 7 m
radius = 3.5/2 = 1.75 m

Area to be painted = curved surface area excluding 0.5 m
= 2 * 3.14 * 1.75 * 7
= 76.93 m.sq.