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Question

If the base area of a cone is 616cm2, its height is 48cm, then its slant height is:
  1. 50cm
  2. 25cm
  3. 8cm
  4. 18cm

A
25cm
B
50cm
C
8cm
D
18cm
Solution
Verified by Toppr

We know, the base of a cone is a circle.
Therefore, the base area =π×r2
616= π×r2
r=14 cm

Also, the height of the cone h=48cm.

Now, we know,
l2=r2+h2
l2=142+482
l2=2500
l=50 cm

Hence, option B is correct.

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