Question 1092750
the diameter is 80 centimeters


the height is 12.5 meters.


the chimney forms a right cylinder.


the formula for the lateral surface area of a right cylinder is equal to 2 * pi * r * h


pi = 3.14.
r = half of the diameter = 40 centimeters.
h = the height which is equal to 12.5 meters.


one centimeter is equal to .01 meters.


convert everything to meters to get:


pi = 3.14.
r = half of the diameter = .4 meters.
h = the height which is equal to 12.5 meters


the formula of 2 * pi * r * h for the lateral surface area of the chimney becomes 2 * 3.14 * .4 meters * 12.5 meters.


this results in a lateral surface area of 31.4 square meters.


at rs 140 per square meter, the cost will be 140 * 31.4 = rs 4396.