5 Views

Question : Chord AB of a circle is produced to a point P, and C is a point on the circle such that PC is a tangent to the circle. PC = 12 cm, and BP = 10 cm, then the length of AB (in m) is:

Option 1: 5.4

Option 2: 6

Option 3: 5

Option 4: 4.4


Team Careers360 17th Jan, 2024
Answer (1)
Team Careers360 20th Jan, 2024

Correct Answer: 4.4


Solution :
PC=12 cm
BP=10 cm
PC 2 = AP × BP
Let AB be $x$.
AP = AB + PB = $x+10$
PC 2 = AP × BP
$12^2 = (x+10) × 10 $
⇒ $\frac{144}{10} = x + 10$
⇒ $x+10 = 14.4$
⇒ $x = 4.4$
Hence, the correct answer is 4.4.

Know More About

Related Questions

TOEFL ® Registrations 2024
Apply
Accepted by more than 11,000 universities in over 150 countries worldwide
Manipal Online M.Com Admissions
Apply
Apply for Online M.Com from Manipal University
View All Application Forms

Download the Careers360 App on your Android phone

Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile

150M+ Students
30,000+ Colleges
500+ Exams
1500+ E-books