A sector of radius 21 cm with arc length 44 cm is folded so that its two straight edges meet, forming a cone. What is the base radius of the cone? (π = 22/7)

Question

Accepted Answer

7 cm. The arc becomes the base circumference: 2πr = 44 → 2 × 22/7 × r = 44 → r = 7 cm. The sector radius 21 cm becomes the slant height.

A sector of radius 21 cm with arc length 44 cm is folded so that its two straight edges meet, forming a cone. What is the base radius of the cone? (π = $\frac{22}{7}$ )

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More Class 9 Surface Area of a Cone practice

A sector of radius 21 cm with arc length 44 cm is folded so that its two straight edges meet, forming a cone. What is the base radius of the cone? (π = 722​)

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 9 Surface Area of a Cone practice

A sector of radius 21 cm with arc length 44 cm is folded so that its two straight edges meet, forming a cone. What is the base radius of the cone? (π = $\frac{22}{7}$ )