Question

the areas of two similar triangles ABC and PQR are 64 CM square and 124 CM square respectively and QR=15.4CM , the length of BC =?

Answer 1

i'm not sure whether it is correct or not but i followed like this ABC area : PQR area, 64:144, square root on both to get ratio of sides, 8:12, 2:3 as QR is 15.4, BC will be 15.4*(3/2) = 23.1