circumference of base of the cylindrical open at the top is 132cm .the sum of radius and height is 41cm .find cost of polishing the outer surface area of cylinder at rate rs.10 per square dm.
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The csa of cylinder + pr²
. 2prh + pr²
. 44/7 *
2pr = 132
R + h = 41
R = 21
H = 20
Thus 44/7 * 21 * 20 + 22/7 * 21 *21
44 * 60 + 22 * 63
2640 + 1340
3980 cm
. 2prh + pr²
. 44/7 *
2pr = 132
R + h = 41
R = 21
H = 20
Thus 44/7 * 21 * 20 + 22/7 * 21 *21
44 * 60 + 22 * 63
2640 + 1340
3980 cm
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