1. The radius of cone is 7 cm and its slant height is 9 cm. Find its (i) L.S.A (i) T.S.A (iii) Volume
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Answer:
We know that the radius of cone r=7cm
and its height h=9cm
and the slant height of second cone =t cm
Then, according to the question.
Numerically: The lateral surface of second cone = volume of the first cone
πrl=
3
1
πr
2
h
π×7×l=
3
1
π×7
2
×9
1=
3
1
×
7
7×3×9
=21
Thus the required slant height slant height of the second cone =21cm
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