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A day full of math games & activities. Find one near you.
A day full of math games & activities. Find one near you.
Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved surface area.
Solution:
Diameter of the base of the cone is 10.5 cm and slant height is 10 cm.
Curved surface area of a right circular cone of base radius, 'r' and slant height, 'l' is πrl.
Diameter, d = 10.5cm
Radius, r = 10.5/2 cm = 5.25 cm
Slant height, l = 10 cm
Curved surface area = πrl
= 22/7 × 5.25 × 10
= 165 cm²
Thus, curved surface area of the cone = 165 cm².
☛ Check: NCERT Solutions for Class 9 Maths Chapter 13
Video Solution:
Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Find its curved surface area.
Class 9 Maths NCERT Solutions Chapter 13 Exercise 13.3 Question 1
Summary:
It is given that the diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. We have found that the Curved surface area of the cone is 165 cm².
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