Of 30 students 1 /3 play sports . of those who play sports 2/5 play soccer. how many students play soccer

4 students

Step-by-step explanation:

1/3 of  30 is 10

so ten students play sports

2/5 of 10 is 4

meaning 4 of the students played soccer.

geometry: triangles

solvers

lessons

answers archive

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