hi i am kashif iqbal, u asekd that how can we calculate the capacity of biler through heating surface its a very simple for example a boiler having heating surface of = 1425 sq ft applying thumb rule = 1425/260=5.48 tons
Formula for calculating the area of sphere is : 4 * pi * r * r
The IBR (Indian Boiler Regulations) formula for boilers depends on the type of boiler and its capacity. In general, the formula calculates the minimum safe working pressure (PS) of a boiler based on its heating surface area and capacity. The formula is PS = (W x H^2) / (500 x A), where PS is the safe working pressure, W is the weight of water in the boiler in kg, H is the heating surface area in square meters, and A is the capacity in liters.
The formula for calculating the electric flux () through a closed surface is EdA, where E is the electric field and dA is a differential area element on the surface.
The answer will depend on what information you have.
The formula for calculating the surface charge density of a sphere is: Q / 4r, where represents the surface charge density, Q is the total charge on the sphere, and r is the radius of the sphere.
area of dish end
http://wiki.answers.com/Q/What_is_the_mathematical_formula_for_calculating_a_surface_area_for_a_building"
(2/3)*base*height
6(pi)l2, where l = length of side
The formula for calculating the surface area of a prism is SA 2B Ph, where B is the area of the base, P is the perimeter of the base, and h is the height of the prism. The angle of the prism does not directly affect the surface area calculation.
Please be more specific...
A = 2 x pi x r (r + h)