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The radii of two right circular …

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The radii of two right circular cones of the same height are in ratio 3:5. Find the ratio of their volumes

Posted by Navya Dwivedi 5 years, 10 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 5 years, 10 months ago

Let there be cone 1 and cone 2 respectively.

Let the r and R be the radii of the two right circular cones respectively.

Ratio of base radii = 3 : 5

Volume of cone = 1/3πr²h

⇒Volume of cone 1/Volume of cone 2

⇒ (1/3*πr²h)/(1/3πR²h)

⇒ (1/3*π*3²*h)/(1/3*π*5²*h)

= 3²/5²

= 9/25

= 9 : 25

So, the ratio of their volumes is 9 : 25

1Thank You

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