42cm2
3cm2
21cm2
24cm2
12cm2
Correct answer is C
Length of arc = θ360 x 2πr = 6
θ x 2πr = 360 x 6
θ = 360×62πr
Area of the sector = θ360 x πr2
360×62πr x 1360 x πr2 = r
= 3 x 7
= 21cm2
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