Find the area (in cm²) of the sector of a circle of radius 21 cm with a central angle of 60°. [Use π = 22/7 ]
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 231
Sector area = π × r2 × θ ÷ 360
= 22/7 × 21 × 21 × 60 ÷ 360
= 22/7 × 21 × 21 × 1/6
= 22 × 3 × 21 × 1/6
= 22 × 63 ÷ 6
= 22 × 10.5
= 231