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## Answers

**c.s.a of**

**cone is pirl. it is given c.s.a is 8118/7 and its base is 1782/7.**

first we have to find area of the circle which is base of cone

area of cone is pir^2

so 22/7 x r^2 = 1782/7

r^2 = 1782/7 x 7/22

r^2 = 1782/22 = 81

r= root 81

r=9

now we have got radius so now we have to calculate volume

volume of cone is 1/3pir^2h

here we dont know h to find h we have to simplify c.s.a which it was given

c.s.a pirl=8118/7

22/7 x 9 x l = 8118/7

l = 8118/7 x 7/22 x 1/9

l= 902/22= 41

hence we find l value now we have to find volume

1/3pir^2h

to calculate h we know that slant height formula l^2 = h^2 + r^2

41^2 = h^2 + 9^2

1681= h^2+81

1681-81=h^2

1600=h^2

root 1600=h

40=h

volume 1/3pir^2h

1/3 x 22/7 x 9 x 9 x 40

= 3394.28

volume of cone is 3394.28

first we have to find area of the circle which is base of cone

area of cone is pir^2

so 22/7 x r^2 = 1782/7

r^2 = 1782/7 x 7/22

r^2 = 1782/22 = 81

r= root 81

r=9

now we have got radius so now we have to calculate volume

volume of cone is 1/3pir^2h

here we dont know h to find h we have to simplify c.s.a which it was given

c.s.a pirl=8118/7

22/7 x 9 x l = 8118/7

l = 8118/7 x 7/22 x 1/9

l= 902/22= 41

hence we find l value now we have to find volume

1/3pir^2h

to calculate h we know that slant height formula l^2 = h^2 + r^2

41^2 = h^2 + 9^2

1681= h^2+81

1681-81=h^2

1600=h^2

root 1600=h

40=h

volume 1/3pir^2h

1/3 x 22/7 x 9 x 9 x 40

= 3394.28

volume of cone is 3394.28