1.

Find the area of the sector if the radius is 5 cm and with an angle of 50°.(a) 11.90 cm(b) 10.90 cm(c) 12.90 cm(d) 13.90 cmThe question was posed to me in an international level competition.My question is based upon Area of Sector and Segment of a Circle in portion Area Related to Circles of Mathematics – Class 10

Answer»

The correct option is (b) 10.90 cm

For explanation: The area of the sector = \(\FRAC {x^{\circ }}{360^{\circ }}\) × πr^2

= \(\frac {50^{\circ }}{360^{\circ }} \times \frac {22}{7}\) × 5^2

= 10.90 cm



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