In a circle with radius $6.3\, cm$, an are subtends an angle of measure $150$ at the centre. Find the length of this arc and the area of the sector formed by this arc.
In a circle with radius $6.3\, cm$, an are subtends an angle of measure $150$ at the centre. Find the length of this arc and the area of the sector formed by this arc.
$16.5 cm , 51.975 cm ^{2}$
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