Multiple choice

The radius and height of a right circular cone are in the ratio 5 : 7. If its volume is 4950 m3, find its slant height.

  1. 26 m

  2. 20 m

  3. 30.88 m

  4. 20.88 m

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let r = 5x m and h = 7x m Volume of the cone = 4950 m3
1/3 × π × (5x)2 × (7x) = 4950 x = 3 So, r = 15 m and h = 21 m  So, l = √l2 + h2 = √954 = 30.88 m

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