A right triangle with sides 60 cm, 45 cm and 75 cm is rotated about the side of 60 cm to form a cone. The curved surface area (in cm²) of the cone so formed is:
Given:
The sides of the right triangle are 60 cm,45 cm,75 cm
The triangle is rotated about the side of 60 cm to form a cone
Formula Used:
Curved Surface Area (CSA) of the cone = πrl
where r is the radius of the base, and l is the slant height of the cone.
Solution:
The radius of the base r is the other side of the triangle, which is 45 cm
The slant height l is the hypotenuse of the triangle, which is 75 cm
Thus, the curved surface area of cone = π × 45 × 75 = 3375π cm2
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A right triangle with sides 60 cm, 45 cm and 75 cm is rotated about the side of 60 cm to form a cone. The curved surface area (in cm²) of the cone so formed is:
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