Question

Boiler chimney height calculation formula

Answer 1

$l = \sqrt{r + h}$
now u can find the height by putting value of l and r

Answer 2

A chimney whose uncorrected heightis calculated as 18 metres is associated with a building 24 metres inheight to the ridge of the roof; what should the final chimney height be if the maximum width of the building is (a) more than 24 metres, (b) 9 metres?