Question

please solve the question number 18... brainliest question...chance available
10 points

Answer 1

IN ABC and ΔAPQ
∠BAC=∠PAQ(COMMON)
∠ABC=∠APQ(CORRESPONDING ANGLES)
BY A.A Axiom 
ΔABC≈ΔAPQ
BC/PQ=AC/AQ=AB/AP
BC=AB/AP*PQ
    =12/4*5
    =3*5
    =15