Question
Quantitative Ability and Data Interpretation Question on Plane Figures
In triangle PQR, PS is perpendicular to QR and S divides QR in the ratio of 3: 1 internally. If PQ =21 and PR =9, find QR.
A
18√5
B
16√5
C
15√5
D
12√5
Answer
12√5
Explanation
Solution
The Correct option is (D): 12√5