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
The answer will depend on what information you have.
area of dish end
(2/3)*base*height
http://wiki.answers.com/Q/What_is_the_mathematical_formula_for_calculating_a_surface_area_for_a_building"
6(pi)l2, where l = length of side
Please be more specific...
It depends on how many sides are part of the "opening".
A = 2 x pi x r (r + h)
2(l*w)+2(w*h)+2(l*h)=surface area
calculating surface area
2LW +2LH + 2WH L=length H= height W= width
the formula for calculating the surface area of an oval is A = Pi * a * b where a & b are the semimajor(half the long) and semiminor(half the short) axes