alleryAn arc subtends 60° at the centre of a circle of radius 21 cm. Using pi = 22/7, find its length.
A33 cm
B18 cm
C22 cm
D11 cm
Answer & Solution
Correct answer: C. 22 cm
The full circumference is 132 cm and 60 degrees is one sixth of it, giving 22 cm.
Keep practising Geometry and Trigonometry
Browse all Geometry and Trigonometry questions for RRB NTPC, or explore more Mathematics topics.
Related questions
RRB NTPC · Trigonometric RatiosRRB NTPC · Triangle CentersRRB NTPC · Classify Angle TypesRRB NTPC · Match Trigonometric ValuesWhich line segment connects two points on a circle and divides it into two segments?When does the sum of two side lengths equal the third side?What total measure in degrees do the two non-right angles of a right triangle add up to?What geometric shape is the planar region bounded by two concentric circles?