the slant height of a cone is 20cm,the diameter of the base is 15cm.find the curved surface area of cone .
Answers
Answer:
slant height (l)=20 cm
diameter(d)=15 cm
radius(r)= 7.5 cm
curved surface area of cone = π×r×l
= 22/7×7.5×20
= 471.24 cm is the answer
Step-by-step explanation:
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Answer:
The curved Surface Area of the cone is 417 cm.
Step-by-step explanation:
Given: slant height of cone= 20cm
diameter of cone= 15cm
The formula for the curved surface area of the cone:
S = π(D/2)l
where π stands for 22/7 or 3.14 (approx)
D/2 is equal to a radius as the diameter is divided by 2
l stands for slant height
since curved surface area= π(D/2)l
= 22/7* 15/2* 20
= 22/7* 7.5* 20
= 3.14* 7.5* 20
=417cm (ans)
(Hint: The curved surface area is defined as the area of the curved surface, leaning the circular top and base. Basically, we calculate curved surface area, and the total surface area is calculated in a 3D figure)
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