Find the area of a sector whose arc length is 30pie cm and angle of the sector is 40°.
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Length of the arc=30π
Length of the arc=y/360 × 2πr
30π=40/360 × 2πr
30π/2π × 360/40 = r
15 × 9 = r
Radius of the circle = 135cm
The area of a sector is given by y/360 × πr² (y is the angle of the sector)
= 40/360 × 3.14 × 135 × 135
=6358.5cm²
Length of the arc=30π
Length of the arc=y/360 × 2πr
30π=40/360 × 2πr
30π/2π × 360/40 = r
15 × 9 = r
Radius of the circle = 135cm
The area of a sector is given by y/360 × πr² (y is the angle of the sector)
= 40/360 × 3.14 × 135 × 135
=6358.5cm²
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