If the price of 4 dozen on of pen is 576 how many pen can be bought in Rupees 228

19

Step-by-step explanation:

4 dozens = 4 × 12 = 48

48 pen = 576

x pen = 228

48 = 576

x = 228

x = (228 × 48)/576

x = 10,944/576

x = 19

geometry: triangles

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call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584