Question

If ∆ ABC ~ ∆ PQR, area of ∆ ABC = 81 sq.cm, area of ∆ PQR = 144 sq.cm and QR = 6cm, then length of BC is *

Answer 1

Answer:

area abc/area pqr = bc^2/qr^2=81/144

bc/qr = 9/12 = 3/4

bc/6 = 3/4

bc = 6×3/4=9/2