17. 18.The perimeter of a sector of a circle is equal to the length of the arc of a semi-circle having the same radius, then the angle of sector is/are(A) 140°32'44" (B) 65°27'16'' (C) (1-2)(D) (1 - 3)Assuming that a person of normal sight can read print at such a distance thatthe letters subtend an angle of 5’at his eye, then the height of letters that hecan read a distance of 12 m is/are472ST(A) 1.7 cm (B) 2.7 cm (C) cm (D)99cmplz answer fast urjent

17. 18.The perimeter of a sector of a circle is equal to the length

1.	17. 18.The perimeter of a sector of a circle is equal to the length of the arc of a semi-circle having the same radius, then the angle of sector is/are(A) 140°32'44" (B) 65°27'16'' (C) (1-2)(D) (1 - 3)Assuming that a person of normal sight can read print at such a distance thatthe letters subtend an angle of 5’at his eye, then the height of letters that hecan read a distance of 12 m is/are472ST(A) 1.7 cm (B) 2.7 cm (C) cm (D)99cmplz answer fast urjent
Answer» the awser is D