0 votes 0 votes In a triangle $\text{PQR, PQ} = 12$ cm and $\text{PR} = 9$ cm and $\angle \text{Q} +\angle \text{R} = 120^{\circ}$. Find the length of $\text{QR}$ $\dfrac{15}{\sqrt2}$ cm $3\sqrt13$ cm $5\sqrt5$ cm $5\sqrt17$ cm Quantitative Aptitude cat2013 quantitative-aptitude geometry + – admin asked Mar 6, 2020 • edited Mar 26, 2022 by Lakshman Bhaiya admin 4.5k points 463 views answer comment Share See all 0 reply Please log in or register to add a comment.