hey friends... answer this question...
Share
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Answer:
Length of PR is 19 cm.
B is correct option.
Explanation:
PQ is diameter of larger circle.
Radius OQ is half of PQ
Radius of larger circle OQ= 13 cm
Radius of smaller circle OR = 8 cm
QR is tangent on inner circle at point R.
OR is perpendicular to QR because radius perpendicular to tangent.
In ΔORQ, ∠ORQ=90°
Using pythagoreous theorem,
In ΔPRQ, Using cosine law
Substitute into above formula and solve for PR
Thus, Length of PR is 19 cm.
B is correct option.