Question

find the slant height of a cone of curved surface area of 20cm and radius 3cm​

Answer 1

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Answer 2

Given,

The radius of the cone = 3 cm

The curved surface area = 20 cm²

To find,

The slant height of the cone.

Solution,

We can simply solve this mathematical problem by using the following mathematical process.

Let, the slant height of the cone = l cm

Curved surface area = 22/7 × 3 × l = 66l/7 cm²

According to the data mentioned in the question,

66l/7 = 20

l = 20 × 7/66

l = 2.12

Hence, the approximate slant height is 2.12 cm