Question

given ∆ ABC ~∆ PQR of ab/pQ =1/3 find ar∆ABC/ar∆PQR

Answer 1

the ration of area of similar triangles is equals to the square of the ratio of it's coresponding sides
ar∆ABC/ar∆PQR=(1/3)²
                           =1/9

Answer 2

the ratio of area of similar triangles is equals to the square of the ratio of their corresponding sides
 therefore, ar∆ABC/ar∆PQR=(1/3)²
                                            =1/9
hope it will help you..