Question

In ∆ABC, AB=5 cm, BC = 7cm,
CA=9 cm. APQR - ∆ABC and perimeter of APQR is 63 cm. What is the length of PQ in cm?
(A) 27
(B) 5
(C) 15
(D) 21​

Answer 1

since ∆ABC is similar to ∆PQR

Thus corresponding sides are equal

put PQ=5k,QR=7k and PR=9k

then add these all three and put equal to 63

solve and you will get ans i.e. 15